Ingredients: 1 and 1/2 sticks unsalted butter; 1/3 cup semi-sweet chocolate chips; 3/4 cup cocoa powder; 1 cup peanut butter chips; 1 and 3/4 cup sugar; 1 cup flour; 1 tsp. baking powder; 3 eggs; 1 tsp. vanilla; 1/8 tsp. sea salt.
Directions: Preheat oven to 350 degrees. Grease an 8x8 square pan or use parchment paper for easy lifting. Use a double boiler to melt the butter and semi-sweet chocolate chips or place chips and butter into a heat proof bowl over a saucepan filled with 1-2 inches of simmering water. Do not let the bowl touch the water. Stir frequently, until chips are butter are completely melted. Remove from the burner. Add the sugar. Stir with a whisk for 1 minute. Add the vanilla, cocoa powder, flour, eggs, and sea salt. Stir until smooth. Fold in the peanut butter chips. Bake for 35 minutes or until a toothpick inserted into the middle comes out clean or with few crumbs (no wet batter). Cool completely before cutting into squares.