Copycat Costco Sheet Cake Recipe Mashed

If you’re a fan of the deliciously moist and generously frosted sheet cakes from Costco, then you’re in for a treat! This recipe for a Copycat Costco Sheet Cake is sure to satisfy your sweet tooth and bring a taste of the bakery home to your kitchen. Whether you have a special occasion to celebrate or simply crave a slice of nostalgia, this recipe will have you baking up a delightful dessert that’s perfect for sharing with family and friends.

**Copycat Costco Sheet Cake Recipe**

**Ingredients:**
– 2 cups all-purpose flour
– 1 ½ cups granulated sugar
– 1 teaspoon baking powder
– ½ teaspoon baking soda
– 1 teaspoon salt
– 1 cup unsalted butter, softened
– 1 cup sour cream
– 4 large eggs
– 2 teaspoons vanilla extract

**For the Frosting:**
– 1 cup unsalted butter, softened
– 4 cups powdered sugar
– 2 teaspoons vanilla extract
– 2-4 tablespoons heavy cream
– Food coloring (optional)

**Instructions:**

1. **Preheat your oven:** Begin by preheating your oven to 350°F (175°C) and greasing a 13×9-inch baking pan.

2. **Prepare the batter:** In a large mixing bowl, whisk together the flour, sugar, baking powder, baking soda, and salt until well combined. Add the softened butter and sour cream to the dry ingredients, mixing until the batter is smooth and creamy.

3. **Incorporate eggs and vanilla:** Beat in the eggs, one at a time, ensuring each is fully incorporated before adding the next. Stir in the vanilla extract until evenly distributed throughout the batter.

4. **Bake the cake:** Pour the batter into the prepared baking pan, spreading it out evenly with a spatula. Place the pan in the preheated oven and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean. Allow the cake to cool completely before frosting.

5. **Prepare the frosting:** In a separate bowl, cream the softened butter until smooth. Gradually add the powdered sugar, mixing well after each addition. Stir in the vanilla extract. If the frosting is too thick, add heavy cream, one tablespoon at a time, until it reaches your desired consistency.

6. **Decorate your cake:** Once the cake has cooled, spread a generous layer of frosting over the top using a spatula. For a classic Costco look, use a fork to create a decorative pattern on the frosting. Feel free to add food coloring to the frosting to achieve your preferred shade.

7. **Serve and enjoy:** Slice the Copycat Costco Sheet Cake into squares and serve it up to your eager guests. Whether it’s a birthday celebration or a casual gathering, this cake is sure to be a hit. Store any leftovers in an airtight container at room temperature or in the refrigerator.

Indulge in the rich, velvety texture of this Copycat Costco Sheet Cake for a taste of bakery perfection right in your own home. With its moist crumb and luscious frosting, this recipe will have you coming back for more. Enjoy the process of baking and savoring this delightful treat with those you love.