Strawberry Sheet Cake is bursting with strawberry flavor and covered in a thick layer of fresh strawberry buttercream :
2 heaping cups sliced fresh strawberries
1 (16.5-ounce) box white cake mix
3 large eggs
3/4 cup vegetable oil
1 (3-ounce) package strawberry gelatin
2 cups sliced strawberries
1 cup butter, softened
3 cups confectioners’ sugar
1 teaspoon vanilla extract
Lightly spray a 9×13-inch pan with cooking spray and preheat oven to 350 degrees.
Place 2 cups of strawberries in a blender or food processor and process until very finely chopped. Measure out 1 cup.
Add cake mix, eggs, and vegetable oil to a mixing bowl. Use a hand mixer or stand mixer to mix well.
Mix in the 1 cup of strawberry puree and the (dry) strawberry gelatin.
Pour batter into prepared pan and bake for 30 to 35 minutes or until a wooden pick inserted in the center comes out clean. Let cool.