How do I store Mint Chocolate Chip Sheet Cake?

Mint Chocolate Chip Sheet Cake should be stored in an airtight container in the refrigerator because of the buttercream frosting. It will stay fresh for up to four days. For the best texture and flavor, let the cake sit at room temperature for about 20 to 30 minutes before serving. If you need to store it longer, you can freeze the unfrosted chocolate sheet cake tightly wrapped for up to two months. Thaw overnight in the refrigerator, then prepare and spread the mint chip frosting before serving.

Can I make Mint Chocolate Chip Sheet Cake ahead of time?

Yes, Mint Chocolate Chip Sheet Cake is an excellent make-ahead dessert. You can bake the chocolate cake layer one day in advance. Once fully cooled, wrap it tightly and refrigerate overnight. Prepare the peppermint frosting the next day and frost just before serving for the freshest presentation. This makes it ideal for parties, potlucks, and holiday gatherings when you want to plan ahead.

Can I turn Mint Chocolate Chip Sheet Cake into cupcakes or a layer cake?

Absolutely. This Mint Chocolate Chip Sheet Cake batter works well for other formats. For cupcakes, divide the batter evenly into lined muffin tins and bake for 15 to 18 minutes, or until a toothpick comes out clean. For a layer cake, divide the batter between two round cake pans. Adjust the baking time to approximately 25 to 35 minutes depending on pan size. You may want to increase the frosting quantity to ensure enough mint chip buttercream for layering and decorating.

Mint Chocolate Chip Sheet Cake – Easy & Irresistible

Name: Mint Chocolate Chip Sheet Cake
Prep time: 20 min
Cook time: 35 min
Total time: 55 min
Cuisine: American
Ingredients: 1 3/4 cups (220g) all-purpose flour; 2 cups (400g) granulated sugar; 3/4 cup (75g) unsweetened cocoa powder; 2 teaspoons baking soda; 1 teaspoon baking powder; 1 teaspoon salt; 1 cup (240ml) whole milk; 1/2 cup (120ml) vegetable oil; 2 large eggs; 1 teaspoon vanilla extract; 1 cup (240ml) hot water; 1/2 cup (113g) unsalted butter, softened; 3 cups (360g) powdered sugar; 1/2 cup (120ml) heavy whipping cream; 1/2 teaspoon peppermint extract; 2–3 drops green food coloring; 1/4 cup (45g) finely chopped dark chocolate (semisweet or bittersweet)

Description

Mint Chocolate Chip Sheet Cake is a rich and moist chocolate cake baked in a 9×13-inch pan, topped with fluffy peppermint buttercream frosting and finely chopped dark chocolate. Inspired by classic mint chocolate chip ice cream, this easy sheet cake is perfect for birthdays, holidays, and summer gatherings.

Ingredients

Scale

1 3/4 cups (220g) all-purpose flour
2 cups (400g) granulated sugar
3/4 cup (75g) unsweetened cocoa powder
2 teaspoons baking soda
1 teaspoon baking powder
1 teaspoon salt
1 cup (240ml) whole milk
1/2 cup (120ml) vegetable oil
2 large eggs
1 teaspoon vanilla extract
1 cup (240ml) hot water
1/2 cup (113g) unsalted butter, softened
3 cups (360g) powdered sugar
1/2 cup (120ml) heavy whipping cream
1/2 teaspoon peppermint extract
2–3 drops green food coloring
1/4 cup (45g) finely chopped dark chocolate (semisweet or bittersweet)

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Instructions

Preheat the oven to 350°F (175°C). Grease and line a 9×13-inch baking pan with parchment paper.
In a large bowl, whisk together the flour, sugar, cocoa powder, baking soda, baking powder, and salt.
In a separate bowl, whisk the milk, vegetable oil, eggs, and vanilla extract until smooth.
Add the wet ingredients to the dry ingredients and mix until combined.
Slowly pour in the hot water and mix until the batter is smooth and thin, scraping down the sides of the bowl.
Pour the batter into the prepared pan and bake for 35 minutes, or until a toothpick inserted in the center comes out clean.
Allow the cake to cool completely in the pan before frosting.
To prepare the frosting, beat the softened butter until creamy and smooth.
Add the powdered sugar one cup at a time, mixing well after each addition.
Slowly add the heavy whipping cream while mixing on medium speed until light and fluffy.
Mix in the peppermint extract and green food coloring until evenly combined.
Gently fold in the finely chopped dark chocolate.
Spread the frosting evenly over the cooled cake and create decorative swirls with the back of a spoon.

Notes

Ensure the cake is completely cool before frosting to prevent melting.
Use peppermint extract, not spearmint, for the classic mint chocolate chip flavor.
If the frosting is too thick, add 1 tablespoon (15ml) heavy cream at a time until desired consistency is reached.
If the frosting is too soft, add 2 tablespoons (15g) powdered sugar at a time to thicken.
The unfrosted cake can be made one day ahead and stored tightly wrapped in the refrigerator.
Store leftovers in an airtight container in the refrigerator for up to 4 days.

Prep Time: 20 minutes
Cook Time: 35 minutes
Category: Dessert
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1 slice (1/16 of cake)
Calories: 411 kcal
Sugar: 49 g
Sodium: 305 mg
Fat: 18 g
Saturated Fat: 13 g
Unsaturated Fat: 4 g
Trans Fat: 0.5 g
Carbohydrates: 63 g
Fiber: 2 g
Protein: 4 g
Cholesterol: 47 mg