Colorful funfetti cake loaded with rainbow sprinkles is the ultimate fun family birthday celebration. This cheerful, moist vanilla cake brings joy and festivity to every party.
Preheat your oven to 350°F (175°C) and line two 8-inch cake pans with parchment paper, greasing the sides for easy release.
In a medium bowl, whisk together the all-purpose flour, baking powder, and kosher salt for even leavening and flavor.
In a large mixing bowl, cream the unsalted butter and granulated sugar at medium-high speed for 3-4 minutes until light and fluffy.
Add eggs to the creamed mixture one at a time, beating well after each addition, then mix in the vanilla extract.
Reduce mixer speed to low. Alternate adding the flour mixture and milk in three additions, beginning and ending with flour; avoid over-mixing for a tender cake.
Gently fold the rainbow sprinkles into the batter with a spatula, taking care not to overmix so colors don't bleed.
Divide the batter evenly between prepared pans. Smooth the tops with a spatula for even baking.
Bake on the middle oven rack for 28-32 minutes until a toothpick inserted into the center comes out clean and the cake springs back when touched.
Cool cakes in pans for 10 minutes, then run a knife around the edge and invert onto a wire rack; let cool completely before frosting.