A soft, buttery yellow cake with a tender, moist crumb. Choose either the smaller 9-inch square batch or the full 9×13-inch batch; do not combine the two ingredient groups.
Buttery Yellow Cake (9-Inch Square or 9×13-Inch)
Equipment
- Electric hand or stand mixer
- Mixing bowls
- 9-inch square metal pan or 9 x 13-inch metal pan
- Wire cooling rack
- Parchment paper, optional
Ingredients
For One 9-Inch Square Cake
- 184 g cake flour about 1 1/2 cups plus 1 tablespoon
- 1 3/8 teaspoons baking powder
- scant 1/4 teaspoon baking soda
- 1/3 teaspoon fine salt
- 156 g unsalted butter about 11 tablespoons; softened to room temperature
- 208 g granulated sugar about 1 cup plus 2 teaspoons
- 1 large egg room temperature
- 1 large egg yolk room temperature
- 1 1/2 teaspoons pure vanilla extract
- 111 g full-fat sour cream about 7 tablespoons; room temperature
- 166 g whole milk about 2/3 cup plus 1 teaspoon; room temperature
For One 9 x 13-Inch Cake
- 266 g cake flour 2 1/4 cups
- 2 teaspoons baking powder
- 1/4 teaspoon baking soda
- 1/2 teaspoon fine salt
- 226 g unsalted butter 1 cup or 16 tablespoons; softened to room temperature
- 300 g granulated sugar 1 1/2 cups
- 2 large eggs room temperature
- 2 teaspoons pure vanilla extract
- 160 g full-fat sour cream 2/3 cup; room temperature
- 240 g whole milk 1 cup; room temperature
Instructions
Choose the Pan Size
- Use only the ingredient group for your chosen pan: either the 9-inch square quantities or the 9 x 13-inch quantities. Do not combine both groups.
Prepare the Cake
- Heat the oven to 350°F. Generously grease a light-colored metal pan in your chosen size. If you intend to remove the whole cake, line the bottom with parchment and grease the parchment.
- Whisk together the cake flour, baking powder, baking soda, and salt.
- Using an electric mixer, beat the softened butter and sugar on medium-high speed for a full 3 minutes, until very light and fluffy.
- For the 9-inch square cake, beat in the whole egg and egg yolk. For the 9 x 13-inch cake, beat in both whole eggs. Add the vanilla, scrape down the bowl, and beat in the sour cream.
- On low speed, mix in half the dry ingredients, followed by half the milk. Repeat with the remaining dry ingredients and milk.
- Stop mixing as soon as the batter is smooth. Scrape the bottom of the bowl by hand to incorporate any remaining pockets of flour.
- Spread the batter evenly in the prepared pan.
Bake and Cool
- Bake the 9-inch square cake for 32 to 38 minutes. Begin checking at 30 minutes.
- Bake the 9 x 13-inch cake for 32 to 38 minutes, rotating the pan halfway through. Tent loosely with foil if the top or edges brown too quickly.
- The cake is finished when the center springs back lightly and a toothpick inserted in the center comes out clean or with a few moist crumbs.
- Cool completely in the pan on a wire rack before frosting or serving.