Ingredients;
2 cups cake flour
6 tbsp unsweetened cocoa powder
1 tsp baking powder
1 tsp baking soda
1/4 tsp salt
8 tbsp unsalted butter,softened
1 1/2 cups granulated sugar
2 eggs( room temperature)
1 tsp vanilla
1 cup buttermilk
1 tsp white vinegar
drops of purple food coloring