Mom's Strawberry Rhubarb Upside-Down Cake

Prep time: 15 min
Cook time: 60 min
Servings: 18
Yield: 18 servings

Description

This rhubarb upside-down cake with strawberry Jell-O and mini marshmallows is easy to make with a cake mix. Serve chilled with whipped cream.

Ingredients

5 cups chopped fresh rhubarb
3 cups miniature marshmallows
1 cup white sugar
1 (3 ounce) package strawberry flavored Jell-O®
1 (18 1/4 ounce) package yellow cake mix

Directions

1 Preheat the oven to 350 degrees F (175 degrees C). Grease a 9x13 inch pan.
2 Stir rhubarb, marshmallows, sugar, and Jell-O mix together in a large bowl. Spread evenly in the prepared pan. Mix cake batter according to package directions; pour evenly over ingredients in the pan.
3 Bake in the preheated oven until a toothpick inserted into the center comes out clean, about 1 hour. Run a knife around outer edges of cake to loosen; turn out onto a large plate while still hot. Let cake cool before serving.