Cinnamon Roll Cake (from scratch) Ingredients for the cake: 3 c all-purpose flour, sifted 1/4 tsp salt 1 c granulated sugar 4 tsp baking powder 1 and 1/2 c milk 2 large eggs 2 tsp vanilla extract 1/2 c (1 stick) unsalted butter, melted for the cinnamon filling: 1 c (2 sticks) unsalted butter, softened