Copycat Costco Cookie Dough Cake Recipe

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When I first heard about the Costco cookie dough cake, I was instantly intrigued. My family and I have always been fans of those big, chewy cookies from Costco’s bakery section, so the idea of combining that classic flavor with the joy of a homemade cake felt like the ultimate treat.

What Is Costco Cookie Dough Cake?

Costco cookie dough cake is the nickname people are using for a newer Costco bakery cake called the Kirkland Signature Chocolate Chip Cookie Bar Cake.

Ingredients:

For The Cake Layers:

• 2 cups all-purpose flour
• 2 tsp baking powder
• 1/2 tsp baking soda
• 1/2 tsp salt
• 1 cup unsalted butter, softened
• 1 1/2 cups granulated sugar
• 4 large eggs
• 1 tbsp vanilla extract
• 1 cup whole milk

For The Cookie Dough Filling:

• 3/4 cup unsalted butter, softened
• 1 cup brown sugar, packed
• 1/4 cup granulated sugar
• 2 tbsp milk
• 2 tsp vanilla extract
• 2 cups all-purpose flour (heat-treated; see tips below)
• 1/2 tsp salt
• 1 cup mini chocolate chips

For The Frosting:

• 1 cup unsalted butter, softened
• 2 cups powdered sugar
• 2–3 tbsp milk
• 1 tsp vanilla extract
• Pinch of salt

Instructions:

Prepare The Cake Layers:

• Preheat your oven to 350°F (175°C). Grease and line two 8-inch round cake pans.
• In a medium bowl, combine flour, baking powder, baking soda, and salt.
• With a mixer, cream together butter and sugar until light and fluffy (about 3–4 minutes).
• Add eggs one at a time, beating well after each addition. Stir in vanilla.
• Alternately add dry ingredients and milk to the butter mixture, beginning and ending with dry ingredients. Mix until just combined.
• Divide batter evenly between pans. Bake for 28–32 minutes, or until a toothpick comes out clean.
• Cool in pans for 10 minutes, then remove and cool completely on wire racks.

Make The Cookie Dough Filling:

1. If you haven’t heat-treated flour yet: Spread flour on a baking sheet; bake at 350°F for 5 minutes. Let it cool completely.
2. In a mixer, beat the butter and sugar until creamy.
3. Add milk and vanilla; blend until smooth.
4. Gradually add cooled, heat-treated flour and salt. Mix until the dough starts to come together.
5. Fold in mini chocolate chips.
6. Chill the filling in the fridge for at least 30 minutes for easier spreading.

Prepare The Frosting:

1. Beat butter until creamy.
2. Add powdered sugar gradually, mixing until smooth.
3. Stir in vanilla, salt, and milk until frosting is light and fluffy. Add more milk as needed for the desired consistency.

Assemble The Cake:

1. Level cakes if necessary. Place one cake layer on your serving plate.
2. Spread a generous layer of cookie dough filling over the top.
3. Place the second cake layer on top.
4. Cover the assembled cake with frosting. Decorate with extra mini chocolate chips, cookie dough balls, or chocolate drizzle if desired.
5. Chill the cake for 30 minutes before slicing for cleaner pieces.

Tips For A Good Costco Cookie Dough Cake:

• Heat-Treating Flour: Essential for safe edible cookie dough. Don’t skip this step.
• Softened Butter: Room-temperature butter ensures smooth batters and fillings.
• Chilled Cookie Dough: Chill the filling if it’s too soft to spread; this helps it hold its shape in the cake.
• Level Layers: Use a serrated knife to level cakes so the finished dessert stacks neatly.
• Customization: Add a pinch of espresso powder to the filling for depth; swap vanilla cake for chocolate if you prefer.
• Serving: Refrigerate leftovers; the cake tastes excellent cold or at room temperature.

What To Serve Costco Cookie Dough Cake With

• Fresh Fruits: Fresh berries, think strawberries, raspberries, or blueberries provide a refreshing brightness. Sliced bananas or pears also balance the richness of the Costco Cookie Dough Cake. Arrange the fruit in a colorful bowl or artfully scatter them around the cake platter for a vibrant touch.
• Ice Cream: A scoop of vanilla ice cream is classic and always a hit. For ice cream lovers, cookies and cream, salted caramel, or even coffee ice cream add layers of flavor that mingle perfectly with the cookie dough in the cake. Serve a few small bowls and let guests choose their favorites.
• Whipped Cream: Homemade or store-bought whipped cream adds a light, creamy texture. Offer a bowl of whipped cream with a spoon on the side, so everyone can add as much or as little as they like to their slice.
• Chocolate or Caramel Sauce: Drizzling warm chocolate ganache or silky caramel sauce over each slice takes things up a notch. For easy serving, place minor pitchers of each sauce on the table so guests can help themselves.
• Coffee & Hot Drinks: A rich Costco Cookie Dough Cake pairs perfectly with coffee. Brew a fresh pot of coffee, offer a selection of teas, or serve a round of hot chocolate. For an adult gathering, a splash of Bailey’s or Kahlúa in coffee is always well-received.
• Milk: A classic glass of cold milk is simple and so satisfying, especially for kids and cookie-lovers. Pour glasses before serving the cake or set out a pitcher with ice cubes to keep it chilled.
• Nuts: A small dish of toasted pecans, walnuts, or sliced almonds adds crunch and a slightly savory counterpoint. Sprinkle nuts on top of each slice or let guests add them themselves.
• Mini Chocolate Chips or Sprinkles: For a festive touch, provide a bowl of mini chocolate chips or colorful sprinkles. Kids and adults can decorate their own slice, adding an extra element of fun to dessert time.

Substitute Ingredients:

Flour Substitutes:

• Gluten-Free: Use a measure-for-measure gluten-free all-purpose flour blend. These blends often contain xanthan gum, which helps mimic the texture of traditional flour.
• Whole Wheat Flour: Swap up to half of the all-purpose flour with whole wheat flour for added fiber and a slightly nutty flavor.

Sugar Alternatives:

• Coconut Sugar: Replace white or brown sugar with coconut sugar for a lighter caramel flavor and lower glycemic index.
• Maple Syrup or Honey: Substitute 1 cup of granulated sugar with 3/4 cup maple syrup or honey. Reduce the liquid in the recipe by about 2 tablespoons for each cup of syrup or honey used.
• Monk Fruit or Stevia: Use stevia, monk fruit sweetener, or erythritol for a lower-calorie option (follow package instructions for proper measurement).

Dairy-Free Options:

• Butter: Use vegan butter or a neutral oil (like coconut oil or avocado oil) in equal amounts for a dairy-free version.
• Milk: Swap milk with almond, oat, soy, or coconut milk with a 1:1 ratio.
• Chocolate Chips: Pick dairy-free mini chocolate chips such as those made by Enjoy Life or similar brands.

Egg Substitutes:

• Flax Eggs: Mix 1 tablespoon ground flaxseed with 3 tablespoons water per egg. Let it sit for a few minutes until it has a gel-like consistency.
• Applesauce: Use 1/4 cup unsweetened applesauce per egg, especially good in the cake layer for moisture.
• Vegan Egg Replacers: Commercial egg replacers like Ener-G or Bob’s Red Mill work well for baking.

Nut-Free Adaptations:

• Sunflower Butter: When recipes call for nut-based spreads or butters, sunflower butter is a popular nut-free option.
• Nut-Free Flour: For added protein or texture, oat flour or quinoa flour can be used in small amounts alongside your main flour.

Alternative Flavors:

• Extracts: Try adding almond extract, hazelnut extract, or even a dash of orange zest for a fun flavor twist.
• Mix-Ins: Swap chocolate chips for butterscotch chips, white chocolate chips, or even dried fruit for a unique spin.

Lower Sugar or Less Sweet Variations:

• Fruit Purees: Replace some of the sugar with fruit purees like banana or pear sauce to lessen the sweetness and add moisture.
• Reduced Sugar Chocolate Chips: Use semi-sweet or dark chocolate chips that are lower in sugar.

Final Thoughts

Baking a Costco cookie dough cake fills your kitchen with the sweetest aroma and creates a centerpiece that brings everyone together. Each slice is a celebration of classic cookie dough flavor layered with tender cake, and it’s sure to spark smiles and happy conversations at your table.

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