Homemade Oatmeal Cream Pies are soft and chewy cookie sandwiches with a fluffy buttercream filling. This easy treat is perfect for lunchboxes, desserts, or sharing with family and friends.
Preheat oven to 350°F and line cookie sheets with parchment paper.
In the bowl of a stand mixer fitted with the paddle attachment, or with large bowl and hand mixer, cream together butter, dark brown sugar, and white sugar until light and fluffy, about 2-3 minutes.
Add eggs, one at a time, beating well after each egg.
Beat in honey and vanilla extract.
Add the salt, baking soda, all purpose flour and quick oats. Mix on low until fully incorporated.
Let the cookie dough rest 10 minutes.
Using a medium scoop, or 2 tablespoons, place cookies 2 in apart on cookie sheets and then slightly flatten tops.
Bake for 10-12 minutes, just until the edges are starting to golden and center is no longer glossy.
Let cookies cool for 5 minutes on pan, then remove to wire rack or counter to cool completely.
Cream Filling
In the bowl of a stand mixer fitted with the paddle attachment, or with large bowl and hand mixer, beat butter until creamy.
Add the powdered sugar and vanilla and mix until no longer crumbly.
Add a tablespoon of water at a time to achieve desired consistency.
Bump up speed and beat filling until light and fluffy, about 2-3 minutes.
Assemble Sandwiches
Turn half of the cooled cookies over.
Using a large scoop (3 tablespoons) place filling on bottoms of cookies. (Or fill a pastry or zip top bag, snip the corner and pipe the filling leaving a ¼" edge.)
Top with remaining cookies and gently make a sandwich.