Marble Cake Mix

Store the unopened box in a cool, dry pantry. Once opened, store any unused mix in an airtight container in a cool, dry place for up to 1 month.

For a richer flavor, use milk instead of water when combining the wet ingredients.

Don't overmix the batter once the wet ingredients are added; this can result in a tough cake.

Gently swirl the chocolate and vanilla batters together with a knife or skewer for a marbled effect. Too much swirling will blend the colors.

Over-mixing the batter after combining wet and dry ingredients, leading to a dense cake.

Swirling the batters too much, which can result in a uniform brown cake instead of distinct swirls.