Peanut Butter Rocky Road Fudge

1½ cups semi-sweet chocolate chips
1½ cups peanut butter chips
1 (14 oz) can sweetened condensed milk, divided
2 tsp vanilla extract, divided
2 tbsp butter, divided
2 cups miniature marshmallows, divided
2 cups dry roasted peanuts

Line a 9” x 9” pan with foil, leaving a 1-1/2” overhang on each end. Spray foil with Pam; set aside.

Divide sweetened condensed milk between two microwave-safe bowls. (Just eyeball it.) In one bowl add chocolate chips and 1 Tablespoon of butter; in the other bowl add peanut butter chips and 1 Tablespoon of butter. First microwave the chocolate and condensed milk combination, stirring every 30 seconds until melted. Next microwave condensed milk and peanut butter chips, stirring every 30 seconds until melted.  Stir 1 teaspoon of vanilla into each bowl.

Pour mixtures into the pan, one at a time, swirling together if you like (I didn't). Sprinkle peanuts on top, and then follow with the marshmallows, pressing down lightly. Chill until firm.

Carefully lift out of the pan with the ends of the foil; cut into squares.