Browned Butter Oatmeal Cream Pies

Preheat your oven to 375 degrees
First, brown your butter. Place the unsalted butter in a medium-sized saucepan over medium heat. Allow it to melt and then boil, stir continuously, your butter is done once the boiling bubbles stop making cracking and popping noises and you see tiny brown flecks.
Pour the hot butter over the brown sugar into the bowl of a standing mixer. Stir and allow the hot butter to start to melt the sugar and cool down. Turn the mixer on high and beat until the butter is no longer hot.
Add the eggs and vanilla, stir until combined.
Now add the flour, oats, baking soda, cinnamon and salt. Mix on low until just combined.
Scoop the cookies using a standard size cookie scoop onto light metal cookie sheet lined with parchment paper.
Bake for 9-10 minutes. Remove and allow the cookies to sit on the pan for 5-10 minutes while they cool and set.
Remove the cookies and allow them to fully cool before frosting.

Combine marshmallow creme, powdered sugar, vanilla, and cream in a medium-sized bowl with a hand mixer. Mix until smooth. If the frosting seems too runny, add 1/2 cup more powdered sugar.
Scoop a spoonful of frosting on the backside of one cookie and top it with another cookie to make a sandwich. This recipe should make 11-12 sandwiches.