Iced Oatmeal Cookie Recipe: The Coolest Treat on a Hot Day
Forget the oven’s heat and embrace the chill! These Iced Oatmeal Cookies are a delightful twist on a classic, offering a refreshing and satisfying treat perfect for summer afternoons or any time you crave a little something sweet. They’re soft, chewy, packed with wholesome oats and warm spices, and topped with a simple, yet irresistible, vanilla glaze. What could be better? These aren’t your grandma’s dry, crumbly oatmeal cookies; these are moist, flavorful, and utterly addictive. Prepare to be amazed at how easily these cookies come together and how quickly they disappear!
Why This Recipe Works
🍳 What You'll Need for This Recipe
Essential tools to make this recipe perfectly
This Iced Oatmeal Cookie recipe isn’t just a random collection of ingredients; it’s a carefully balanced formula designed for cookie perfection. Here’s why it works so well:
- The Right Ratio of Wet to Dry: We use the perfect proportion of butter, eggs, and milk to ensure a moist and tender cookie. No dry, crumbly cookies here!
- Brown Sugar is Key: Brown sugar contributes to the cookie’s chewy texture and adds a depth of molasses-like flavor that complements the oats and spices beautifully.
- Oats for Texture and Flavor: Rolled oats provide a wonderfully chewy texture and a subtle nutty flavor that’s characteristic of oatmeal cookies. Using quick-cooking oats helps bind the dough and prevents the cookies from being too dense.
- Warm Spices for Depth: A blend of cinnamon, nutmeg, and a hint of cloves adds warmth and complexity to the flavor profile, making these cookies incredibly comforting and delicious.
- Chilling the Dough: Chilling the dough before baking allows the flavors to meld together and prevents the cookies from spreading too thin during baking. This results in thicker, chewier cookies.
- Simple Vanilla Icing: The vanilla icing adds a touch of sweetness and visual appeal, perfectly complementing the warm spices and chewy texture of the cookie. It’s the perfect finishing touch!
Ingredients
- For the Cookies:
- 1 cup (2 sticks) unsalted butter, softened
- 1 cup packed light brown sugar
- 1/2 cup granulated sugar
- 2 large eggs
- 1/4 cup milk
- 1 teaspoon vanilla extract
- 1 1/2 cups all-purpose flour
- 1 teaspoon baking soda
- 1 teaspoon ground cinnamon
- 1/4 teaspoon ground nutmeg
- 1/4 teaspoon ground cloves
- 1/2 teaspoon salt
- 3 cups rolled oats (quick-cooking)
- For the Icing:
- 2 cups powdered sugar
- 3-4 tablespoons milk
- 1 teaspoon vanilla extract

Instructions
- Cream the Butter and Sugars: In a large bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy. This will take about 3-5 minutes using an electric mixer.
- Add the Wet Ingredients: Beat in the eggs one at a time, then stir in the milk and vanilla extract. Make sure everything is well combined.
- Combine the Dry Ingredients: In a separate bowl, whisk together the flour, baking soda, cinnamon, nutmeg, cloves, and salt.
- Gradually Add Dry to Wet: Gradually add the dry ingredients to the wet ingredients, mixing on low speed until just combined. Be careful not to overmix the dough.
- Stir in the Oats: Stir in the rolled oats until they are evenly distributed throughout the dough.
- Chill the Dough: Cover the bowl with plastic wrap and chill the dough in the refrigerator for at least 1 hour, or preferably 2-3 hours. This step is crucial for preventing excessive spreading during baking.
- Preheat the Oven: Preheat your oven to 375°F (190°C). Line baking sheets with parchment paper or silicone baking mats.
- Scoop and Bake: Use a cookie scoop or spoon to drop rounded tablespoons of dough onto the prepared baking sheets, leaving about 2 inches between each cookie.
- Bake the Cookies: Bake for 10-12 minutes, or until the edges are lightly golden brown.
- Cool Completely: Remove the baking sheets from the oven and let the cookies cool on the baking sheets for a few minutes before transferring them to a wire rack to cool completely. This is important to prevent them from breaking apart.
- Prepare the Icing: While the cookies are cooling, prepare the icing. In a medium bowl, whisk together the powdered sugar, milk, and vanilla extract until smooth and creamy. Add more milk, one tablespoon at a time, if needed to reach your desired consistency.
- Ice the Cookies: Once the cookies are completely cool, dip the tops of the cookies into the icing or spread the icing evenly over the tops using a knife or spatula.
- Let the Icing Set: Allow the icing to set completely before serving or storing the cookies. This will take about 30 minutes to an hour.
- Enjoy! Serve and enjoy your delicious Iced Oatmeal Cookies!
Tips for Success
Want to bake the perfect batch of Iced Oatmeal Cookies? Here are a few tips to ensure success:
- Use Room Temperature Ingredients: Softened butter and room temperature eggs will incorporate more easily into the dough, resulting in a smoother and more uniform texture.
- Don’t Overmix the Dough: Overmixing can develop the gluten in the flour, leading to tough cookies. Mix until just combined.
- Chill the Dough: This is a crucial step! Chilling the dough prevents the cookies from spreading too thin and allows the flavors to meld together.
- Use Parchment Paper or Silicone Baking Mats: This will prevent the cookies from sticking to the baking sheets and make cleanup a breeze.
- Don’t Overbake: Overbaked cookies will be dry and crumbly. Bake until the edges are lightly golden brown. The centers will still appear slightly soft, but they will firm up as they cool.
- Cool Completely Before Icing: Icing warm cookies will cause the icing to melt and run. Make sure the cookies are completely cool before icing.
- Adjust the Icing Consistency: Add more milk, one tablespoon at a time, to adjust the icing to your desired consistency. For a thinner icing, add more milk. For a thicker icing, add more powdered sugar.
- Add Sprinkles (Optional): For an extra touch of fun, sprinkle the iced cookies with sprinkles before the icing sets.
Storage Instructions
To keep your Iced Oatmeal Cookies fresh and delicious, store them properly:
- Room Temperature: Store the cookies in an airtight container at room temperature for up to 3-4 days.
- Freezer: For longer storage, you can freeze the cookies. Place them in a single layer on a baking sheet and freeze until solid. Then, transfer them to a freezer-safe bag or container. Frozen cookies will keep for up to 2-3 months. Thaw them at room temperature before serving. It’s best to freeze them without the icing for optimal quality, then ice them after thawing.

FAQ
💝 My Kitchen Favorites
The tools I use every day that make cooking a joy
Here are some frequently asked questions about this Iced Oatmeal Cookie recipe:
- Can I use old-fashioned rolled oats instead of quick-cooking oats? While quick-cooking oats are recommended for their finer texture, you can use old-fashioned rolled oats. However, the cookies may have a slightly chewier and more rustic texture. You might also consider pulsing the old-fashioned oats in a food processor a few times to break them down slightly.
- Can I use a different type of sugar? While brown sugar is essential for the chewy texture and flavor, you can substitute the granulated sugar with coconut sugar or another granulated sweetener.
- Can I make these cookies gluten-free? Yes, you can substitute the all-purpose flour with a gluten-free all-purpose flour blend. Be sure to choose a blend that contains xanthan gum for binding.
- Can I add nuts or dried fruit to the cookies? Absolutely! Feel free to add chopped walnuts, pecans, raisins, or cranberries to the dough for extra flavor and texture.
- My icing is too thick/thin. What should I do? If the icing is too thick, add more milk, one tablespoon at a time, until you reach your desired consistency. If the icing is too thin, add more powdered sugar, one tablespoon at a time, until it thickens up.
Conclusion
These Iced Oatmeal Cookies are a guaranteed crowd-pleaser, offering a delightful combination of warm spices, chewy oats, and sweet vanilla icing. They’re easy to make, perfect for any occasion, and sure to satisfy your sweet tooth. So, ditch the store-bought cookies and bake a batch of these homemade treats today. You won’t regret it! These cookies are more than just a dessert; they’re a taste of comfort and nostalgia, perfect for sharing with loved ones or enjoying all by yourself. Happy baking!