INGREDIENTS
2
Egg whites
2
Eggs, large
1/2 tsp
Baking powder
1/2 tsp
Baking soda
45 g
Brown sugar
200 g
Castor sugar
60 g
Cocoa powder
1/8 tsp
Cream of tartar
375 g
Icing or powdered sugar
105 g
Plain flour
1/2 tsp
Vanilla extract
12
Graham crackers or biscuits
230 g
Butter, unsalted
120 milliliters
Buttermilk
3 tbsp
Milk