Secret ingredient homemade cream filling sandwiched between soft, chewy oatmeal cookies create the best oatmeal cream pie on this planet. Little Debbie would be proud!
2cupsold-fashioned rolled oatsdo not substitute quick oats
1 ¾cupall-purpose flour
1 ½cupsdark brown sugarpacked
1cup(2 sticks) unsalted buttersoftened
2large eggs
1tablespoonmolasses
2teaspoonsvanilla extract
2teaspoonscorn starch
1teaspoonbaking soda
½teaspoonsalt
½teaspoonground cinnamon
¼teaspoonallspice
Filling
½cup(1 stick) unsalted buttersoftened
1 ½cuppowdered sugar
⅓cupmarshmallow fluff
2tablespoonsheavy creamor 3 tablespoons if you prefer a looser filling
1teaspoonvanilla extract
1/8teaspoonsalt
Instructions
Cookies
In the bowl of a mixer, cream together 2 sticks butter and brown sugar until light and fluffy.
Add eggs, molasses, and vanilla extract. Beat mixture for about 30 seconds, scraping down the sides of the bowl as needed.
In a separate bowl, whisk together dry ingredients (flour, baking soda, salt, corn starch, cinnamon, allspice, and oats) until well-combined.
Add dry ingredients to wet ingredients, and mix until just combined, scraping down the sides of the bowl as needed.
Wrap cookie dough in plastic wrap, and chill in the refrigerator for about 1 hour.
Preheat oven to 375°F. Line a baking sheet with a Silpat or parchment paper. Form 2 tablespoons dough balls, placing on baking sheet at least 2 inches apart.
Bake for 8-10 minutes until cookies are just set and barely golden around the edges. Leave cookies on baking sheet to cool for 5 minutes before placing on a baking rack.
Repeat for consecutive batch(es)! Let cookies completely cool before adding filling.
Frosting Filling
In the bowl of a mixer, whip together butter, marshmallow, vanilla and salt until well combined, about 1-2 minutes. Some marshmallow will stick to the sides of the bowl, so you’ll need to stop the mixer and scrap down the sides a few times.
Add powdered sugar, and whip for an additional minute.
Add 2 tablespoons of cream, whipping for 30 seconds until fluffy and combined. If you prefer looser filling, add an additional tablespoon of cream, and whip again.
Assembly
Find 2 cookies that are roughly the same shape. Add a tablespoon or so of filling to the bottom of 1 cookie and sandwich the other cookie on top of the filling. Repeat until the cookies are gone!
Video
Notes
If you like a lot of frosting filling, I recommend doubling the frosting recipe.