Preheat oven to 325°. Line cupcake pans with paper liners; set aside.
Combine in a bowl both flours, sugar, baking powder and salt. Mix on low speed until combined for about 3 minutes. Add in 2 sticks of cubed butter, mixing until just coated with flour.
Add eggs 1 at a time until combined. Slowly add milk and 1 teaspoon vanilla to batter until completely mixed scraping down the bowl as you mix.
Scoop batter into baking cups filling about 2/3 full. Bake until a cake tester inserted in the center comes out clean, 17 to 20 minutes.
Cool and decorate with Old Fashioned Frosting.
Cream softened butter and add 4 cups confectioner's sugar, milk and 2 teaspoons vanilla. Beat with paddle attachment until smooth gradually add the rest of sugar to reach frosting consistency.