Cake Mix Toffee Bars

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By Emma Clarke

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If you’ve ever had one of those days when dessert needs to happen but time isn’t on your side, you’re in the right place. That’s exactly why I love this cake mix toffee bars recipe. It’s sweet, chewy, and wonderfully easy. I made a batch last weekend when my daughter Ella had friends over, and they were gone in no time. With simple pantry ingredients and just 10 minutes of prep, this recipe is always a winner in our house.

Stack of chewy cake mix toffee bars with gooey caramel and melted chocolate
Chewy cake mix toffee bars stacked with caramel and chocolate drizzle
Table of Contents

Why Cake Mix Toffee Bars Are a Must-Try

A Sweet Shortcut for Busy Days

One of the things I absolutely love about these cake mix toffee bars is how incredibly simple they are to whip together. Honestly, if my Kiwi mum could bake treats like this after a long shift at her café, so can you. Using a box of yellow cake mix as the base is such a clever little shortcut. It saves time but still delivers that buttery, chewy texture that feels homemade in every bite.

The rich toffee bits melt perfectly into the soft cake base, creating gooey little pockets of caramel goodness. Add chocolate chips if you like (my son Oliver insists on them), and you’ve got a dessert that tastes like it came straight from a bakery.

Perfect for Family Gatherings or Quick Cravings

What I really enjoy about this cake mix toffee bars recipe is how versatile it is. Whether it’s a school bake sale, a weekend potluck, or just an afternoon snack for my kids, it always fits the bill. Last week, I made a tray for our casual Sunday family dinner, and even my usually dessert-ignoring husband, Danny, went back for seconds.

Plus, with a total time of just 40 minutes from start to finish, it’s quicker than most shows we watch together as a family. It’s one of those dependable recipes that always delivers a crowd-pleasing treat with minimal effort.

Cake Mix Toffee Bars Recipe

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Recipe card for cake mix toffee bars with gooey caramel and chocolate layers

Cake Mix Toffee Bars


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  • Author: Emma Clarke
  • Total Time: 40 minutes
  • Yield: 12 servings 1x

Description

Chewy, gooey cake mix toffee bars made with simple pantry ingredients. Quick to prepare, perfect for busy families.


Ingredients

Scale
  • 1 box (15.25 oz) yellow cake mix (432 grams)
  • 1/2 cup unsalted butter, melted (113 grams)
  • 1 large egg (50 grams)
  • 1 cup toffee bits (170 grams)
  • 1/2 cup chocolate chips, optional (85 grams)
  • 1/2 cup sweetened condensed milk (156 grams)

Instructions

  1. Preheat oven to 350°F (175°C) and grease a 9×13-inch baking pan.
  2. In a bowl, mix cake mix, melted butter, and egg until a dough forms.
  3. Fold in toffee bits and optional chocolate chips.
  4. Press two-thirds of the dough into the prepared pan as the base.
  5. Pour sweetened condensed milk evenly over the base.
  6. Crumble the remaining dough over the top.
  7. Bake for 25-30 minutes until edges are golden and center is set.
  8. Cool completely before slicing into bars.

Notes

  • Optional toppings: drizzle with caramel or serve with vanilla ice cream.
  • Line your pan with parchment for easier removal.
  • Store in an airtight container for up to 4 days or freeze for 2 months.
  • Prep Time: 10 minutes
  • Cook Time: 30 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1 bar
  • Calories: 200
  • Sugar: 15g
  • Sodium: 150mg
  • Fat: 8g
  • Saturated Fat: 5g
  • Unsaturated Fat: 2g
  • Trans Fat: 0g
  • Carbohydrates: 30g
  • Fiber: 1g
  • Protein: 2g
  • Cholesterol: 30mg

Ingredients and Step-by-Step Guide for Cake Mix Toffee Bars

Simple Ingredients You’ll Always Have Handy

The beauty of this cake mix toffee bars recipe is how it turns basic pantry items into a sweet treat that feels completely homemade. Honestly, this is one of those recipes I fall back on when the kids ask for dessert and I want it to be easy but delicious.

Ingredients for cake mix toffee bars
Ingredients for cake mix toffee bars

Here’s exactly what you need:

  • 1 box (15.25 oz) yellow cake mix (430 grams)
  • 1/2 cup unsalted butter, melted (1 stick or 114 grams)
  • 1 large egg (about 50 grams)
  • 1 cup toffee bits (170 grams)
  • 1/2 cup chocolate chips, optional (85 grams)
  • 1/2 cup sweetened condensed milk (156 grams)

Equipment:

  • Mixing bowl
  • 9×13-inch baking pan

It’s the same simple approach I love about my pecan pie dump cake. Both start with something store-bought and transform it into something that feels like a little celebration.

Easy Steps to Delicious Toffee Bars

Start by heating your oven to 350°F (175°C) and greasing your baking pan to avoid any sticky surprises later.

In a mixing bowl, combine the cake mix with melted butter and the egg. Mix it until the dough looks thick and soft, almost like cookie dough. Once that’s ready, stir in the toffee bits and chocolate chips. My son Oliver likes to sneak a few chocolate chips at this stage.

Take about two-thirds of your dough mixture and firmly press it across the base of your prepared baking dish. It forms a nice, buttery crust. Pour the sweetened condensed milk right over the top, spreading it evenly to make sure every bite gets that gooey goodness. Then crumble the rest of the dough over everything like little cookie chunks.

Pop the pan into the oven and bake for 25 to 30 minutes, until you see the edges turn golden brown and the middle looks set but soft. The smell in the kitchen at this point is incredeble.

After removing from the oven, allow the bars to cool thoroughly before slicing into portions. I love serving these the same way I serve my butterfinger caramel cheesecake bars. A little scoop of ice cream or a drizzle of caramel makes them feel extra special.

Clever Tricks and Common Mistakes with Cake Mix Toffee Bars

Easy Ways to Make Cake Mix Toffee Bars Even Better

Over the years, I have made this cake mix toffee bars recipe countless times for family gatherings, school events, and even quiet weekends at home. And with every bake, I find fun little ways to make them taste even more delicious.

One thing that always works for me is adding a little contrast. Right after baking, I like to sprinkle a tiny bit of sea salt on top. It creates this lovely balance that keeps the bars from feeling overly sweet.

Another tweak we love at home is playing with mix-ins. Sometimes, instead of using regular choclate chips, I toss in white chocolate or butterscotch chips. My daughter Ella gets especially excited when we use white chocolate because it melts beautifully into the buttery base of these cake mix toffee bars.

If you prefer an even chewier bite, you can slightly reduce the cake mix by a tablespoon or two. It gives the bars a softer, more caramel-like texture in the middle.

Lining your baking pan with parchment paper is another step I never skip. It saves me from struggling to lift the bars out, especially when we are in a rush for dessert, just like when I make our favorite old-fashioned Norwegian rhubarb cake.

Common Issues and Prevention Tips

While this cake mix toffee bars recipe is super straightforward, a couple of small mistakes can trip you up if you are not careful.

If your bars come out too crumbly, they were likely left in the oven a little too long. The trick is to pull them out when the center still looks slightly soft because they will firm up as they cool.

Sometimes, if the sweetened condensed milk is not spread evenly, you might end up with some sections that are drier while others are overly gooey. Taking a minute to smooth it out evenly over the base makes all the difference.

Using cold butter instead of melted can make the dough stiff and tricky to work with. Melted butter blends easily and gives the dough that soft, cookie-like texture you want for these cake mix toffee bars.

And one more tip from experience, press the bottom layer firmly and evenly across the pan. If it is too thin in places, the filling can leak underneath, creating messy edges.

For another dessert that comes together just as easily but requires no oven at all, you might love my no-bake caramel cheesecake shooters. They are always a hit when we want something cool and creamy.

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Irresistible cake mix toffee bars served fresh with gooey caramel and chocolate

Why Cake Mix Toffee Bars Deserve a Spot in Your Recipe Rotation

Why This Cake Mix Toffee Bars Recipe Always Works

There is a reason this cake mix toffee bars recipe keeps showing up in my kitchen. It is the perfect balance of chewy, buttery, and sweet with pockets of melty toffee and chocolate in every bite. I love how it transforms a basic box of cake mix into a dessert that feels bakery-worthy but takes hardly any effort.

The combination of a soft cookie-like base, gooey sweetened condensed milk, and crunchy toffee bits is what makes this recipe shine. It is one of those desserts that disappears from the plate faster than anything else I make, whether it is for a family movie night or a quick treat after dinner.

What I especially love is how flexible this recipe is. You can swap the chocolate chips for caramel bits, sprinkle some chopped nuts on top, or even drizzle it with melted chocolate once it has cooled. It is the kind of dessert that welcomes creativity, much like my mini egg cheesecake that always gets a seasonal twist.

A Family Favorite for a Reason

This cake mix toffee bars recipe has quickly become one of those “make it again, please” desserts in our home. I remember the first time I made it, my son Oliver asked if it could be part of our weekly treat rotation. That was the moment I knew this one was a winner.

It is also incredibly reliable. No fancy equipment. No complicated steps. Just mix, layer, bake, and enjoy. Whether I am baking for a school event, a family gathering, or just because it is a gloomy Tuesday and we need something sweet, this recipe never lets me down.

And if you are a fan of simple, satisfying recipes like we are, I think you will also enjoy my scotcheroo truffles. They are another easy favorite that always brings a smile.

Sweet and Simple Every Time

If you are searching for a dessert that is quick, easy, and guaranteed to impress, this cake mix toffee bars recipe is exactly what you need. It transforms simple ingredients into chewy, buttery bars packed with gooey toffee goodness.

I love how adaptable this recipe is. Whether I am tossing in chocolate chips, trying butterscotch, or keeping it classic, it always turns out perfectly. It has truly become one of those family favorites we reach for time and time again.

So next time you have a box of cake mix sitting in your pantry, give this recipe a try. You will be glad you did. And for more easy, delicious treats like this, make sure to follow me on Pinterest at Tuck In Bites for new recipes every week.

FAQ About Cake Mix Toffee Bars

What else can I make with a box cake mix?

So many things beyond cake. You can make cookies, bars, dump cakes, and more. I often use cake mix for quick desserts like these cake mix toffee bars, or even layered cheesecake bars and simple cookie bars. It is one of my favorite shortcuts for busy days.

How to make toffee shards for cake?

It is easier than it looks. Simply melt sugar in a dry pan over medium heat until it turns a deep amber color. Pour the melted sugar onto parchment paper and let it harden. Once cool, break it into shards. It is a fun project that my daughter Ella loves helping with.

How to make a boxed cake mix taste like a bakery cake?

A few simple swaps work like magic. Replace the water with milk, use melted butter instead of oil, and add one extra egg. I also like adding a teaspoon of vanilla extract. These tweaks not only work for cakes but make my cake mix toffee bars recipe taste even more rich and bakery-fresh.

What happens if you add condensed milk to cake mix?

Adding sweetened condensed milk brings extra moisture, richness, and a chewy texture. It turns basic batter into something gooey and indulgent. That is exactly what makes these cake mix toffee bars so special. The condensed milk creates a soft, almost caramel-like layer in the center.

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