Oatmeal Whoopie Pies
These homemade Oatmeal Whoopie Pies feature soft, chewy oatmeal cookies with a sweet vanilla cream center.The cookies are prepared with rolled oats, flour, butter, brown sugar, and warm cinnamon.A creamy filling adds sweetness and a smooth, fluffy texture to every sandwich.The recipe uses simple pantry ingredients that are easy to find in most grocery stores.These treats are perfect for afternoon snacks, holiday baking, lunchboxes, and parties.Serve them fresh or chill them briefly for a delicious bakery-style dessert at home.
Ingredients
For the oatmeal cookies
- 1 cup (90 g) old-fashioned rolled oats
- 1 cup (125 g) all-purpose flour
- ½ teaspoon baking soda
- ½ teaspoon ground cinnamon
- ¼ teaspoon salt
- ½ cup (113 g) unsalted butter, softened
- ½ cup (100 g) packed brown sugar
- ¼ cup (50 g) granulated sugar
- 1 large egg
- 1 teaspoon vanilla extract
- 2 tablespoons milk, as needed
For the vanilla cream filling
- ½ cup (113 g) unsalted butter, softened
- 1½ cups (180 g) powdered sugar
- 1 teaspoon vanilla extract
- 1–2 tablespoons milk or cream
- ½ cup (approximately 60 g) marshmallow creme, optional for a fluffier filling
Instructions
- Preheat your oven to 350°F (175°C). Line two baking trays with parchment paper to prevent sticking and make cleanup easier.Measure all the ingredients before beginning. Allow the butter and egg to come to room temperature so they combine smoothly and evenly.
- In a medium bowl, whisk together the all-purpose flour, rolled oats, baking soda, ground cinnamon, and salt.Mix until the ingredients are evenly distributed. Set the bowl aside while you prepare the cookie dough.
- In a large mixing bowl, beat the softened butter, brown sugar, and granulated sugar until the mixture becomes light and creamy.Add the egg and vanilla extract. Beat again until everything is well combined, scraping down the sides of the bowl when necessary.
- Gradually add the dry ingredient mixture to the butter mixture. Stir until a soft dough forms.Add the milk a little at a time if the dough seems too dry. The finished dough should be soft enough to scoop but firm enough to hold its shape.Avoid overmixing, as excessive mixing can make the cookies tougher than desired.
- Scoop approximately 1 tablespoon of dough for each cookie and place it on the prepared baking trays. Leave about 2 inches between each portion to allow for spreading.Gently flatten the tops if needed to encourage even baking. Try to make the cookies similar in size so the finished sandwiches fit together neatly.
- Bake for 10–13 minutes, checking toward the end of the baking time. The edges should be lightly golden, while the centers should remain soft.Avoid overbaking, because the cookies will continue to firm up as they cool. Remove the trays from the oven and let the cookies rest for 5 minutes before transferring them to a wire rack.Allow the cookies to cool completely before adding the filling.
- Beat the softened butter in a mixing bowl until smooth and creamy.Gradually add the powdered sugar, mixing at a low speed at first to prevent it from scattering. Add the vanilla extract and 1 tablespoon of milk or cream.Beat until the filling becomes light and fluffy. Add the optional marshmallow creme and mix until smooth. If the filling is too thick, add a little more milk; if it is too soft, add extra powdered sugar.
- Pair the cooled cookies according to size. Spread or pipe a generous amount of filling onto the flat side of one cookie.Place a second cookie on top, flat side down, and press gently until the filling reaches near the edges without squeezing out excessively.Repeat with the remaining cookies and filling.
- Allow the assembled Oatmeal Whoopie Pies to rest for 10–15 minutes so the filling settles.Serve immediately or refrigerate briefly for a firmer filling. For the best cookie texture, allow refrigerated whoopie pies to sit at room temperature for a few minutes before serving.
Notes
- Choose old-fashioned oats: Rolled oats provide the best chewy texture for this recipe.
- Use softened butter: Properly softened butter helps create a smooth dough and creamy filling.
- Cool completely: Warm cookies can melt the filling and make the sandwiches slide apart.
- Keep cookies uniform: Similar-sized cookies make attractive, evenly filled whoopie pies.
- Adjust the filling: Add milk gradually to achieve the desired consistency.
- Avoid overbaking: Slightly soft centers help keep the cookies tender after cooling.
- Use parchment paper: It helps prevent sticking and promotes easy removal.
- Check your filling ingredients: Marshmallow creme and other filling products may have different ingredients depending on the brand.