This fun and nostalgic dessert combines the classic flavors of a PB&J sandwich in a moist cake filled with jelly and topped with a creamy peanut butter frosting.
1boxyellow or white cake mix (15.25 oz / 432 g), plus ingredients on package
1cupgrape or strawberry jelly
1cupcreamy peanut butter
1/2cupunsalted butter, softened
2cupspowdered sugar
1/4cupmilk (more as needed)
1teaspoonvanilla extract
1/4cupgrape or strawberry jelly, warmed for drizzling
1/4cupchopped peanuts (optional)
Instructions
Preheat your oven to 350°F (175°C). Prepare and bake the cake in a 9×13 inch baking dish according to package instructions.
Let the cake cool for about 10 minutes after baking.
Use the handle of a wooden spoon or straw to poke holes all over the cake, about 1 inch apart.
Warm 1 cup of jelly for 30 seconds in the microwave to make it pourable. Pour or spoon jelly into the holes, allowing it to seep in.
Let the cake cool completely and refrigerate for 1 hour.
In a large bowl, beat peanut butter and butter until creamy. Gradually add powdered sugar, milk, and vanilla extract. Mix until frosting is smooth and spreadable.
Spread the frosting evenly over the cooled cake.
Warm remaining 1/4 cup jelly and drizzle over the frosting. Swirl gently with a knife or toothpick.
Sprinkle with chopped peanuts if desired. Slice and serve.