Brownies

½ cup butter, melted
¼ cup cocoa
1 cup sugar
2 eggs
1 teaspoon vanilla
½ cup flour
1 cup chopped walnuts or pecans (optional)

Mix together melted butter, sugar, and cocoa. Add eggs and vanilla, and mix well. Add dry ingredients and stir just until combined. Stir in nuts.

Pour mixture into 8-inch square baking pan lined with parchment paper. Bake in a 350 degree oven for 18 to 20 minutes.

If desired, garnish brownies with powdered sugar. Place about half a tablespoon of powdered sugar in a small wire mesh strainer and gently tap over hot brownies.