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Double Chocolate 'Box' Brownies

These Double Chocolate Box Brownies are the ultimate indulgence for any chocoholic! Moist and fudgy, these brownies are made with a box mix for convenience, and are loaded with white and dark chocolate chips for an extra dose of decadence.

Tasty Team
96% would make again

Under 30 minutes

Under 30 minutes


for 8 servings

  • 15 ¼ oz chocolate cake mix (430 g), 1 box
  • ⅓ cup whole milk (80 mL)
  • ¼ cup canola oil (80 mL)
  • 1 large egg
  • 12 oz dark chocolate (340 g), chopped, divided
  • 4 oz white chocolate (115 g), chopped

Nutrition Info

  • Calories 504
  • Fat 22g
  • Carbs 76g
  • Fiber 3g
  • Sugar 52g
  • Protein 5g

Estimated values based on one serving size.


  1. Preheat the oven to 350°F (180°C). Line a 9-inch (23 cm) square pan with parchment paper.
  2. In a large bowl, combine the cake mix, milk, oil, and egg.
  3. Add ½ cup (115 g) chopped dark chocolate and the chopped white chocolate and mix until combined.
  4. Spread the brownie batter in the prepared pan.
  5. Sprinkle the remaining chopped dark chocolate on top.
  6. Bake for 30 minutes until toothpick comes out clean when inserted in the middle.
  7. Let cool before slicing and serve.
  8. Enjoy!
  9. Don't just wing it -- plan it! Use our meal planner tool in the Tasty app. Download here.