Fluffer Nutter Blondies

What is a Fluffernutter?  I didn't know until a couple of years ago.  Apparently it's a sandwich made with peanut butter and marshmallow creme (or "fluff").  It started in Massachusetts in the early 20th century and is a beloved culinary tradition carried on today.  I've never actually had one, but when I saw these bars on the blog Something Swanky, I thought it was time to try out the combination.  Everyone in our family, including my daughter who is not a fan of peanut butter, loved these bars.  Especially the gooey yet crispy swirl of fluff!

FLUFFER NUTTER BLONDIES
from Something Swanky

1 cup (2 sticks) butter, softened
1/2 cup peanut butter
1 cup packed brown sugar
1/2 cup sugar
2 eggs
2 tsp. vanilla
1 tsp. baking soda
1 tsp. kosher salt
2 1/2 cups flour
3/4 - 1 cup marshmallow creme

Preheat oven to 350 degrees.  Spray a 9x13 baking pan with cooking spray.

Cream butter and peanut butter; add sugars and beat until light and fluffy.  On medium speed, add in eggs and vanilla.  Stir in the baking soda, salt, and flour until just combined.  Spread batter evenly in prepared pan.  Drop creme by spoonfuls randomly over batter:

And swirl with a knife:

Bake for 25-30 minutes or until a toothpick inserted 1 inch from the edge comes out clean.  Do not over bake.  Let cool before cutting into bars with a wet knife.