7UP Sheet Cake with Strawberry Buttercream Frosting

INGREDIENTS

1 16.25 ounce package

white cake mix

1 cup

all-purpose flour

1 cup

white sugar

1/2 tsp

salt

1 1/4 cups

7UP

1 cup

sour cream

egg whites

2 tbsp

vegetable oil

1/2

lemon (juiced and zested)

1 tsp

vanilla extract

1 cup

butter (softened)

1 tsp

pure vanilla extract

16 oz

powdered sugar

1/2 cup

strawberry preserves or jam (the thicker, the better)

to 3 tablespoon heavy cream (as needed)

3/4

to 1 cup chopped fresh strawberries

Additional fresh strawberries (for garnish)