Chocolate Chip Cookie Dough Fudge

Butter (unsalted and softened, 1/2 cup)

Brown sugar (3/4 cup)

Vanilla extract (1 tsp)

Sweetened condensed milk (14 oz)

All-purpose flour (1 cups)

Chocolate Chips (2 1/2 cups (divided))

Peanut butter (1/2 cup)