Preheat the oven to 350°F and line a cupcake/muffin pan with cupcake liners.
Mix dry ingredients together in a bowl. Then, add vanilla and buttermilk.
Add eggs one at a time, beating well with each addition then scrape down the bowl.
Scrape down the bowl as needed and beat until just combined and smooth.
Divide the batter evenly into a 12-count lined muffin or cupcake pan, filling ⅔ full.
Bake for 20-23 minutes at 350 °F, or until a toothpick inserted in the center comes out clean. Let them cool in the pan for 5 minutes, then transfer to a wire rack and cool to room temperature before frosting.