Procedures

1. 1

   Preheat your oven to 400°F.

2. 2

   Prepare the muffin mix as indicated on the box. Add liners to your muffin tin and fill them until they're each about half full.

3. 3

   Place the peanut butter in a ramekin or small bowl and gently heat in microwave oven for about 10 seconds or until it is softened. Stir well to ensure even heating. Be careful not to not overcook the peanut butter. Add 1to 2 tablespoons of melted peanut butter to each of the muffins and marble with a butter knife.

4. 4

   Bake for 13 minutes and allow to cool before serving.