It all starts with a box of white cake mix.

Jake Sternquist

If you’re heading to a spring party or potluck, bring this showstopping strawberry sheet cake.

It’s made with a fresh strawberry puree and topped with a luscious cream cheese frosting.

Strawberry sheet cake

Credit:Jake Sternquist

This big-batchstrawberry dessert recipeserves 24 and thanks to a boxed cake mix, it’s a cinch to make.

Here’s our Test Kitchen’s best strawberry sheet cake recipe.

Strawberry Sheet Cake Ingredients

Thisstrawberry sheet cake recipeis our favorite way to use up leftover strawberries.

Spraying baking pan with non-stick spray

Credit:Jake Sternquist

Here’s what you’ll need to make it at home.

Here’s a quick look at how to make.

The full strawberry sheet cake recipe is below.

Strawberry puree in blender

Credit:Jake Sternquist

Do not leave the cake at room temperature.

Ingredients

1lb.strawberries, washed and hulled

1pkg.2-layer-size white cake mix

1(3-oz.

Lightly coat a 13x9-inch baking pan with nonstick cooking spray.

wisking flour for strawberry sheet cake

Credit:Jake Sternquist

Make Strawberry Puree

Set aside 3 small berries for a garnish, if desired.

Place remaining berries in a blender or food processor.

Cover and blend until smooth.

mixing strawberry cake batter

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Measure 1 1/4 cups puree; save remaining puree to make the frosting.

Mix Dry Ingredients

In a large bowl whisk together cake mix and gelatin.

Add Wet Ingredients

Add 1 cup strawberry puree, eggs, and oil.

Strawberry sheet cake on cooling rack

Credit:Jake Sternquist

Beat with a mixer on medium until smooth, about 2 minutes.

Pour into prepared pan.

Bake

Bake until a toothpick inserted in center comes out clean, about 40 minutes.

mixing frosting for strawberry cake

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Cool completely in pan on a wire rack.

Make Frosting

Meanwhile, prepare frosting.

Add remaining 1/4 cup strawberry puree, vanilla, and salt; beat until smooth.

Adding strawberries to strawberry sheet cake

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Gradually add powdered sugar, beating on low until smooth and creamy.

Frost Cake

Frost cake with strawberry frosting.

If desired, just before serving slice reserved berries and use to decorate top of cake.

2,000 calories a day is used for general nutrition advice.