Cutting TipWhen pan is no longer hot, refrigerate until chilled. Run sharp knife or pizza cutter under hot water and cut, rinsing under hot water after each cut. Cake-like BrowniesReduce yogurt to 1/2 cup and add 1 egg white. Bake as directed. Lactose IntolerantCan substitute yogurt with applesauce, non-fat sour cream, silken tofu or soy yogurt. Add 1 teaspoon vanilla extract. Double RecipeMix 2 boxes per directions and bake in 9 x 13 pan for 35 to 40 minutes at 350F. FreezingYou can freeze brownies in an airtight container or freezer bag for up to 6 weeks. High AltitudeIncrease oven temp to 365F. Add 2 tablespoons of flour into dry brownie mix and mix per directions above. Bake for 35 to 40 minutes.