These soft, chewy brownie-like bars come together quickly—starting with a box cake mix and a jar of marshmallow crème. The original recipe came from Cooking from the Heart of Hospice, Brookings Hospital Hospice (Brookings, SD),submitted by Dianne Becker.
In a large bowl, stir together cake mix, melted butter, and milk.
In another bowl, stir together the peanut butter and marshmallow crème. It helps to slightly warm the marshmallow crème in the microwave.
Put ¾ of the chocolate mixture in the bottom of the cake pan. Spread it out and press down to cover bottom of pan. Spread the peanut butter mixture over the chocolate. Cover with remaining chocolate batter to create a marbled look. Press it down so it sticks in the peanut butter.
Bake at 350℉ for 20-25 minutes. The edges should be just lightly browned. Cool. Store covered at room temperature.
Notes
This recipe does not require eggs.I added milk but the original recipe does not include milk. Without milk they are a little drier and crumblier. The original recipe said to bake for 15 minutes but that wasn't long enough for mine.