Cake Mix Toffee Bars

Cake Mix Toffee Bars are a sweet, chewy, and buttery dessert that couldn’t be easier to make. Using a simple boxed cake mix as the base, these bars are layered with chocolate chips and crunchy toffee bits for a treat that’s rich, satisfying, and always a crowd-pleaser.

Why You’ll Love This Recipe

I love this recipe because it takes just a few ingredients and a handful of minutes to put together, yet the end result tastes like something you’d find in a bakery. The combination of soft cake-like texture with melty chocolate and crisp toffee is pure magic. These bars are perfect for potlucks, holidays, or any time I need a no-fuss dessert that still impresses.

Ingredients

(Here’s a tip: Check out the full list of ingredients and measurements in the recipe card below.)

yellow cake mix (or butter cake mix)
eggs
butter (melted)
semi-sweet chocolate chips
toffee bits (like Heath bits)
optional: vanilla extract, chopped nuts for topping

Directions

1. I preheat the oven to 350°F and grease a 9×13-inch baking dish.

2. In a bowl, I mix together the cake mix, eggs, and melted butter until a thick dough forms.

3. I press the dough evenly into the bottom of the prepared baking dish.

4. I sprinkle chocolate chips over the dough, followed by a generous layer of toffee bits.

5. I gently press the toppings into the dough so they bake into the bars.

6. I bake for 25–30 minutes, or until the edges are golden and the center is set.

7. I let the bars cool completely in the pan before slicing into squares.

Servings and timing

This recipe makes about 24 bars and takes around 10 minutes to prepare and 25–30 minutes to bake. It’s a quick and easy dessert that’s great for sharing.

Variations

Sometimes I use chocolate cake mix or spice cake mix for a twist on the base flavor. I’ve also added chopped pecans or walnuts for more texture. When I want to switch things up, I use white chocolate chips or a drizzle of caramel on top after baking. A sprinkle of sea salt adds a lovely contrast to the sweetness too.

storage/reheating

I store these bars in an airtight container at room temperature for up to 5 days. They also freeze well—I layer them between wax paper in a freezer-safe container and thaw them at room temperature when I’m ready to serve. No reheating needed—they’re just as delicious at room temp.

FAQs

Can I use other cake mix flavors?

Yes, I’ve tried chocolate, vanilla, and even red velvet cake mix. Each gives the bars a different spin.

Do I need to refrigerate these?

No, I keep them at room temperature unless it’s very warm. If I do refrigerate them, I let them sit out for a bit before serving.

Can I make these in advance?

Absolutely. I often bake them the day before and they stay fresh and chewy for several days.

What are toffee bits?

Toffee bits are small pieces of caramelized sugar and butter—usually available in baking aisles as Heath bits. They add a sweet crunch to these bars.

Can I double the recipe?

Yes, I double it for large gatherings and bake it in a half-sheet pan. Just watch the baking time—it may need a few more minutes.

Conclusion

Cake Mix Toffee Bars are one of my favorite easy desserts. They’re quick, delicious, and endlessly adaptable. Whether I’m baking for a crowd or just craving something sweet and satisfying, these bars always hit the spot. With the buttery base, melty chocolate, and crunchy toffee, they’re impossible to resist.