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Freshly baked cake mix toffee bars cut into squares in a baking pan

Cake Mix Toffee Bars

These chewy, buttery Cake Mix Toffee Bars are an easy dessert made with yellow cake mix, toffee bits, and sweetened condensed milk. They bake in under 30 minutes and are perfect for parties, holidays, or weeknight treats.

  • Total Time: 35 minutes
  • Yield: 12 bars 1x

Ingredients

Scale
  • 1 box (15.25 oz) yellow cake mix
  • ½ cup unsalted butter, melted
  • 1 large egg
  • 1 cup toffee bits (e.g., Heath or chopped toffee)
  • ½ cup chocolate chips (optional)
  • ½ cup sweetened condensed milk

Instructions

  • Preheat oven to 350°F (175°C). Grease or line a 9×13-inch pan with parchment.
  • In a large bowl, combine cake mix, melted butter, and egg until a thick dough forms.
  • Fold in toffee bits and chocolate chips (if using).
  • Press the dough evenly into the prepared pan.
  • Pour sweetened condensed milk evenly over the top.
  • Bake for 20–25 minutes or until golden and set in the middle.
  • Cool for 10 minutes in the pan, then transfer to a wire rack. Cool completely and slice into squares.

Notes

  • For extra flavor, add 1 tsp vanilla extract or a sprinkle of sea salt on top.
  • Bars can be stored at room temperature or frozen for up to 1 month.
  • Gluten-free or vegan substitutions are easy to incorporate (see article for full options).
  • Author: Natalie
  • Prep Time: 10 minutes
  • Cook Time: 25 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Nutrition

  • Serving Size: 1 bar
  • Calories: 200 kcal
  • Sugar: 15g
  • Sodium: 150mg
  • Fat: 10g
  • Saturated Fat: 7g
  • Unsaturated Fat: 4g
  • Trans Fat: 0g
  • Carbohydrates: 30g
  • Fiber: <1g
  • Protein: 2g
  • Cholesterol: 25mg

Keywords: cake mix toffee bars, easy dessert bars, toffee bar recipe, chewy dessert bars, quick dessert recipe, sweetened condensed milk bars