Ingredients
Method
- Preheat the oven to 350°F and line a pan with parchment.
- Whisk the butter, sugar, eggs, and vanilla, then fold in the flour.
- Divide the batter in half, stirring cocoa into one half and red coloring into the other.
- Spoon both batters into the pan in alternating dollops.
- Swirl them together gently with a knife.
- Bake for 28 to 30 minutes, then cool before slicing.
Notes
Don't over-swirl or the two colors will blend into one muddy shade.
