Brownie Mix: 1 package Bob's Red Mill Gluten Free Brownie Mix; 3/4 cup or 1-1/2 sticks melted butter or margarine; 1 large egg (Note: You can use 1/4 cup applesauce, 1/4 cup blended silken tofu or egg alternative of choice as egg replacement); 2 tsp gluten free vanilla extract; 3/4 cup warm (110 degrees F) water; 1/4 cup gluten free chocolate chips or chopped walnuts (optional)