Peachy Goober Cake

1 box Jiffy cake mix
1/4 cup butter
1/3 cup peanut butter
1/2 cup brown sugar, firmly packed
1/4 cup peach juice
1 3/4 cup peach slices
1 egg

Melt butter in an 8-inch square cake pan. Add peanut butter, brown sugar and reserved peach juice to butter. Stir together in pan. Layer peach slices on top of mixture.

Prepare cake mix according to package directions. Pour gently over peach mixture. Bake at 375 degrees F.