Step 1

Preheat oven to 350 degrees F and lightly grease a 9x13 baking dish.

Step 2

Add strawberries to prepared baking dish and mash into a jam-like consistency.

Step 3

Take both packages of jello and sprinkle the powder over the mashed strawberries, followed by the mini marshmallows on top of the jello.

Step 4

In a large bowl, whisk together cake mix as instructed on package. Mix in vanilla extract and then pour the batter on top of the marshmallows.

Step 5

Bake for 43-45 minutes or until cooked through the center.

Step 6

Allow cake to cool for at least 20 minutes before serving. Flip slices upside down on serving plates so the strawberries are on top!