3 classic white butter frosting Recipes

classic white cake, cake flour (9 oz), plus more for dusting the pans, whole milk , at room temperature, egg whites (3/4 cup), at room temperature, almond extract, vanilla extract, granulated sugar (12 1/4 oz), baking powder, table salt, unsalted butter (1 1/2 sticks), softened but still cool, butter frosting, unsalted butter (2 sticks), softened but still cool, sugar (1 lb), vanilla extract, whole milk, table salt, raspberry-almond filling, blanched slivered almonds (2 1/2 oz), toasted and chopped coarse, raspberry jam (seedless )

all-purpose flour, baking powder, fine salt, eggs, room temperature, sugar, unsalted butter, melted, pure vanilla extract, milk, egg whites, sugar, lemon juice, grated lemon zest, cream of tartar, fine salt