Step 1

Preheat the oven to 375 degrees, and grease a 8x8 glass baking dish.

Step 2

In a large mixing bowl, combine the melted butter, sugar, eggs, vanilla extract and whisk well to combine.

Step 3

Add the cacao powder, flour, salt, baking powder, and half of the M&Ms and half of the peanuts into the batter.  Mix well and stir until the batter is smooth.  Add the batter to the baking dish and top with the remaining M&Ms and peanuts.

Step 4

Bake for 30 to 38 minutes (depending on how crisp you like your brownies).

Step 5

Remove and allow to cool for 30 minutes before slicing.