- 1 cup melted butter
- 1 ¼ cups brown sugar
- 2 eggs
- 1 teaspoon vanilla extract
- 2 ¼ cups all-purpose flour
- 1 teaspoon baking powder
- 1 teaspoon salt
- ½ cup chopped Oreos (about 3 Oreos)
- ½ cup M&Ms
- ½ cup mini chocolate chips
- ½ cup toffee bits
- Preheat the oven to 350 F. Line a 9x9-inch baking pan with parchment paper.
- Place the melted butter and brown sugar in a large bowl. Stir to combine. Whisk in the eggs and vanilla.
- Stir in the flour, baking powder, and salt, and mix just until combined.
- Stir in the Oreos, M&Ms, chocolate chips, and toffee bits (reserve a few M&Ms and chocolate chips for the top).
- Transfer the mixture into the lined baking pan. Top with the remaining M&Ms and chocolate chips and press them lightly into the batter.
- Bake for 25-30 minutes, or until the center no longer looks wet. Let cool, then lift out of the pan using the parchment and cut into squares.