We hate to break it to you, peanut butter brownie lovers, but Joanna Gaines is not the original creator of this recipe — though, according to the New York Times, she is. This doesn't necessarily mean Gaines copied and pasted the recipe into her "Magnolia Table: Volume 2" cookbook.
Add dollops of peanut butter on top. Use a knife to swirl the peanut butter into the brownie batter by dragging the tip through the batter. Bake for 20 minutes, or until the filling has set but is still soft. Set aside to cool.
Joanna Gaines is not a cookbook plagiarist, nor is she even remotely lacking when it comes to the gray area of creative attribution. The brownies ended up in her cookbook the way recipes tend to end up anywhere, floating from one satisfied and generous home chef to the next.