Chocolate and Strawberries Cupcakes

INGREDIENTS

1 1/2 cups

granulated sugar (285g)

1/2 cup

vegetable oil (118 ml)

large eggs

1 tbsp

pure vanilla extract (15 ml)

1/2 cup

light sour cream (118 ml)

2 cups

all-purpose flour (280g)

1/2 cup

cocoa powder (55 g)

1 tbsp

espresso powder (5g) (optional)

2 1/2 tsp

baking powder (9 g)

1/2 tsp

baking soda (2 g)

1 tsp

salt (5 g)

1 1/4 cups

coffee (355 ml)

3/4 cup

strawberries, chopped and roughly pureed

2 cups

(4 sticks) unsalted butter

cup granulated sugar

egg whites