Chocolate Nutella Cupcakes with Strawberry Whipped Cream

chocolate fudge cake mix

box chocolate fudge pudding mix

water

vegetable oil

plain Greek yogurt (or sour cream)

eggs

vanilla extract

Nutella

Strawberry Whipped Cream:

whipping cream

Tbl. strawberry jam

Tbl. sugar, depending on how sweet you want it

strawberry extract

sliced strawberries, for garnish, if desired