In a large microwavable bowl, place 2/3 cup of butter with a 1 cup mint chocolate chips (these can be Hershey’s or Andes). Melt these ingredients in the microwave.
Add 1 1/2 cups of sugar, 1/3 cup powdered cocoa, 1 teaspoon vanilla, 1/2 teaspoon baking powder, a sprinkle of salt, and 3 eggs. Stir all the ingredients until the batter runs smooth.
Add 1 cup all-purpose flour and stir again.
Finally, mix in 1 cup of coarsely chopped nuts, along with 2/3 cup of mint chocolate chips (usually this is the rest of the package).
Place in a greased 9 x 13-inch pan and baked at 350 degrees for 30 minutes. When the middle is set, you can take the brownies out of the oven. Cut into bars.
These brownies are moist and delicious.