INGREDIENTS
1 cup
unsalted butter (240 g, softened)
2 cups
granulated sugar (400 g)
4
large eggs
2 1/2 cups
all-purpose flour (312 g)
1 tsp
baking soda
1/4 tsp
salt
1/4 cup
unsweetened cocoa powder (29.5 g)
1 cup
buttermilk (237 mL, room temp)
2 tbsp
sour cream (30 g)
1 tsp
vanilla extract
1 1/2 tbsp
white vinegar
red food coloring