Gluten-Free Oatmeal Cream Pies (Better than Little Debbie!) | Umami

Ingredients

• 1 cup salted butter (softened, 227 grams)
• 1 ½ cups lightly packed light brown sugar (320 grams)
• 1 large egg
• 1 teaspoon vanilla extract
• 1 teaspoon baking soda
• ½ teaspoon ground cinnamon
• ½ teaspoon salt
• 1 ¼ cup gluten-free 1:1 baking flour (180 grams)
• 3 cups gluten-free quick oats (300 grams)
• ¾ cup salted butter (170 grams, softened)
• 1 ½ cups powdered sugar (170 grams)
• 1 7-ounce jar marshmallow fluff/creme
• 1 to 2 tablespoons heavy cream