Fudgy M&Ms Brownies with a Peanut Butter Swirl

1 Preheat the oven to 350F
2 Grease a13 x 9-inch pan.
3 Whisk cooled melted butter, sugar, eggs, and vanilla together until smooth.
4 Mix the dry ingredients.
5 Stir in the dry ingredients to the egg mixture until well blended but do not over beat.
6 Fold in the M & Ms, reserving a few to sprinkle on top.
7 Spoon into the prepared pan.
8 Warm the peanut butter just a little.
9 Spoon it in thick lines across the brownies.
10 Use a spoon to swirl it through - don't ove rmix.
11 Sprinkle with a few more M & Ms if desired.
12 Bake at 350F for 25 to 30 minutes, or until done but still soft in the middle.