These old-fashioned iced oatmeal cookies were the first cookie recipe I shared here, and more than 52,000 Pinterest saves later they remain a reader favorite. With a background in professional baking and countless test batches, this recipe delivers everything you want in a nostalgically spiced cookie: a soft, chewy texture and a glossy vanilla glaze. Home bakers keep coming back to it because it’s consistent, comforting, and easy to make.
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These Frosted Oatmeal Cookies are an “All Time Favorite!”
This is now my all time favorite cookie to make. I had sent some to my moms and everyone tried them and now I’m getting requests for them. These really are just SO good!!
R.Pinterest Review
It’s no surprise these cookies are a blog favorite. Inspired by the classic iced oatmeal cookies many of us grew up with, this version is softer, chewier, and happily more generous with the icing. They beat store-bought varieties with cozy cinnamon flavor and a tender crumb—perfect for sharing or enjoying with a tall glass of milk.
Why You’ll Love this Iced Oatmeal Cookie Recipe
- Perfect any time of year — these homemade iced oatmeal cookies work equally well for everyday treats, holiday platters, or school lunches.
- No chilling or resting required — you can bake these as soon as the dough is mixed, so fresh cookies are ready in under an hour.
- No special equipment — this recipe uses rolled oats for authentic texture; no food processor or blender needed.
The recipe card below includes exact ingredient amounts and step-by-step instructions.
What You’ll Need to Make Frosted Oatmeal Cookies
- Unsalted butter — slightly softened but still cool for best texture and minimal spreading.
- White and brown sugar — the combination adds depth and chewiness; dark brown sugar works well but light will do.
- Large eggs.
- Rolled (old-fashioned) oats — they give the cookies their signature chew.
- All-purpose flour.
- Baking powder and baking soda — to balance rise and tenderness.
- Ground cinnamon and salt — for warmth and balance.
- Vanilla extract — for flavor in both dough and icing.
- Powdered sugar and milk — to make a simple vanilla glaze.
See the recipe card below for exact measurements.
Equipment
- Electric mixer — a stand mixer with a paddle is ideal; a hand mixer works too, though you may switch to a spatula once the oats are added.
- Small cookie scoop — for consistent, evenly sized cookies.
How to Make Iced Oatmeal Cookies
Preheat the oven to 375°F (190°C) and line baking sheets with parchment paper.
Step 1: Beat the butter in a stand mixer fitted with the paddle until smooth and fluffy.
Step 2: Add the sugars and mix on medium-low until combined, scraping the bowl as needed.
Step 3: Add the eggs one at a time, mixing after each, then stir in the vanilla until combined.
Step 4: On low speed, add the flour, cinnamon, salt, baking soda, and baking powder to the wet ingredients.
Step 5: Mix briefly to incorporate dry ingredients, then add the oats and mix on low until just combined. Scrape the bowl once to ensure no streaks of flour remain.
Step 6: Use a tablespoon-sized scoop to portion dough onto the prepared pans.
Gently press the center of each dough mound with two fingers so the cookies bake evenly; don’t flatten completely.
Tip: A slight flattening helps the cookies bake evenly without becoming thin and crispy.
Step 7: Bake 10–12 minutes, until edges are lightly golden and centers have puffed. Cool completely on a wire rack before icing.
Step 8: Make the vanilla icing by whisking confectioners’ sugar, milk, and vanilla until smooth. The glaze should be thick but pourable; add milk a teaspoon at a time if needed.
Step 9: Spoon a thin layer of icing over cooled cookies, or dip the cookie tops for easier coverage. Let the icing set before serving.
Allow the icing to dry completely before storing or stacking.
Hint: Place parchment under the cooling rack to catch drips for easy cleanup.
Iced Oatmeal Cookies Recipe Substitutions
- Use low-fat or dairy-free milk for the icing if you prefer. Avoid half-and-half or cream—milk allows the glaze to set best.
I haven’t tested this with quick or instant oats; if you try them, expect a softer, cakier texture.
Iced Oatmeal Cookie Recipe Variations
- Chocolate lovers — fold in chocolate chips for oatmeal chocolate chip cookies.
- Maple twist — add maple extract or a touch of maple syrup to the icing for a New England flair.
- Nuts — sprinkle chopped toasted walnuts or pecans on the icing while it’s wet.
- Extra warm spices — add 1/2 teaspoon nutmeg, a pinch of cardamom, or a blend like pumpkin pie spice to the dough for deeper flavor.
Iced Oatmeal Cookie Storage
Once the icing is fully set, store the cookies in an airtight container at room temperature for up to three days.
Iced Oatmeal Cookies Recipe Pro Tips
- Use butter that’s softened at the edges but still cool in the center—about 30–60 minutes at room temperature depending on your kitchen. This helps the cookies hold their shape.
- Pull cookies from the oven when the edges are just turning light brown; they’ll finish setting as they cool for the best chewy texture.
- Cool cookies completely before icing so the glaze doesn’t melt into the cookie.
FAQs for Oatmeal Cookies with Icing
Yes. Scoop raw dough onto a baking sheet and freeze until solid, then transfer to a freezer bag for up to a month. Thaw at room temperature 30–40 minutes before baking and bake as directed.
They include oats, which are nutritious, but these cookies and the glaze contain sugar—so they’re best enjoyed as an occasional treat.
No. Store them at room temperature in an airtight container after the icing has dried.
The texture will change—instant oats produce a softer, cakier cookie with less chew.
Overbaking and inaccurate measuring. Measure ingredients properly (no heaping), and remove cookies when centers have just puffed so they don’t overbake.
Three key tips: measure sugars correctly (pack the brown sugar), use cool butter rather than fully softened, and bake at 375°F while gently pressing centers before baking so the edges set quickly.
Iced Oatmeal Cookie pairings
These cookies pair beautifully with cozy beverages—try a maple latte, eggnog latte, oat milk hot chocolate, or a simple sweet cream cold foam-topped coffee to complement the cinnamon and vanilla flavors.
Iced Oatmeal Cookie
Ingredients
- 1 cup (2 sticks) butter, softened but still cool
- 1 cup brown sugar
- 1/2 cup white sugar
- 2 eggs
- 1 teaspoon vanilla extract
- 2 cups all-purpose flour
- 2 1/4 cups rolled oats
- 1/2 teaspoon baking powder
- 1/2 teaspoon baking soda
- 2 teaspoons ground cinnamon
- 1/2 teaspoon salt
For the icing
- 1 1/2 cups confectioners’ sugar
- 3 tablespoons whole milk (or substitute)
- 1 teaspoon vanilla extract
Instructions
- Preheat oven to 375°F and line 3 baking sheets with parchment paper.
- Beat butter until smooth and fluffy. Add the sugars and mix on medium-low, scraping the bowl as needed. Add eggs one at a time, then stir in vanilla.
- With the mixer on low, add flour, cinnamon, salt, baking soda, and baking powder. Mix briefly to combine, then stir in the oats until just combined.
- Scoop tablespoon-sized mounds onto prepared pans.
- Slightly flatten the centers with two fingers—don’t press them flat.
- Bake 10–12 minutes, until edges are lightly browned and centers have puffed.
- Cool completely before icing.
- Make the icing by combining confectioners’ sugar, milk, and vanilla. Spread a thin layer over cooled cookies, allow excess to drip, and let dry. Store in an airtight container.