Description

A soft, buttery vanilla sheet cake made in a 9×13-inch pan, featuring a rich and moist crumb with a creamy vanilla buttercream frosting. Perfect for birthdays, gatherings, or whenever a classic treat is in order.

Ingredients

2 ¾ cups cake flour

1 teaspoon baking powder

½ teaspoon baking soda

½ teaspoon salt

1 ½ cups granulated sugar

½ cup unsalted butter, room temperature

4 large eggs, room temperature

½ cup vegetable oil

⅓ cup full-fat sour cream (or plain yogurt), room temperature

1 ½ tablespoons pure vanilla extract

1 cup whole milk, room temperature

1 cup unsalted butter, room temperature (for frosting)

2 ½ cups confectioners’ sugar, sifted (for frosting)

Pinch of salt (for frosting)

2 teaspoons pure vanilla extract (for frosting)

1–2 tablespoons milk (for frosting)

Rainbow sprinkles (optional, for garnish)

Cook Mode Prevent your screen from going dark

Instructions

Preheat oven to 350 °F (175 °C) and grease or line a 9×13-inch pan with parchment paper.
Whisk together cake flour, baking powder, baking soda, and salt in a bowl.
In a large bowl, beat butter and sugar until light and fluffy, about 5 minutes.
Add eggs one at a time, then mix in oil, sour cream, and vanilla. Batter may appear curdled.
Alternate adding flour mixture and milk in three additions, starting and ending with dry ingredients. Mix until just combined.
Pour batter into prepared pan and smooth the top.
Bake for 30–35 minutes or until a toothpick inserted in the center comes out with a few moist crumbs.
Cool the cake completely in the pan on a wire rack, about 2 hours.
For frosting, beat butter until creamy. Gradually add sugar and salt. Mix in vanilla and milk until smooth and fluffy.
Once the cake is cool, spread frosting evenly over the top and decorate with sprinkles if desired.

Notes

Swap sour cream with plain Greek yogurt for a tangier flavor.
Try different frostings like chocolate, cream cheese, or strawberry.
Add lemon zest or almond extract for variation.
Use festive sprinkles or glaze for a holiday version.
Store at room temperature for up to 3 days or freeze for up to 1 month.

Prep Time: 10 minutes
Cook Time: 30–35 minutes
Category: Dessert
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1 slice
Calories: 310
Sugar: 25g
Sodium: 160mg
Fat: 17g
Saturated Fat: 10g
Unsaturated Fat: 6g
Trans Fat: 0g
Carbohydrates: 36g
Fiber: 0.4g
Protein: 3g
Cholesterol: 70mg