INGREDIENTS
1/4 cup
unsalted butter
3/4 cup
whole milk
1 can
sweetened condensed milk (14oz)
1/2 cup
granulated sugar
4
eggs separated
1
few small drops of white vinegar
1 1/4 cups
powdered sugar
1/2 cup
fresh key lime juice
1 cup
all purpose flour
Extra powdered sugar for dusting the top of the cake