Strawberry Dump Cake

Ingredients (8)

• 31.5 ounces strawberry pie filling (two 15.75-ounce cans)
• 8 ounces cream cheese softened
• 1/4 cup sour cream
• 1/2 cup powdered sugar
• 1 teaspoon vanilla extract
• 1 package vanilla cake mix or white cake mix
• 1/2 cup salted butter cold
• fresh strawberries whole or halved, for serving (optional)