Thick Chewy Iced Oatmeal Cookies at Home

I tried one of those big iced oatmeal cookies from Crumbl Cookies once, and I remember thinking, “this is good… but I’m not driving across town every time I want one.” So I went home and started messing around in my kitchen until I got something close enough—and honestly, I like this version better.

Why This Recipe Works
Here’s the thing—most oatmeal cookies either end up too dry or too thin. What I figured out is that you need a thicker dough and just enough oats to give texture without making it heavy. The glaze is what really makes it. It hardens slightly on top but stays soft underneath, which gives that classic iced cookie feel.

Ingredient Notes
I use old-fashioned rolled oats, not quick oats—they hold their texture better. The cinnamon and nutmeg are subtle but important, don’t skip them. For the glaze, I keep it simple with powdered sugar, milk, and vanilla. It should be thick enough to sit on the cookie without running everywhere.

How to Make It
I start by creaming the butter and sugars together until it looks light and slightly fluffy. Then I mix in the egg and vanilla until everything is smooth.

In another bowl, I mix the flour, baking soda, salt, cinnamon, and nutmeg. Then I add that into the wet ingredients slowly, just until combined. After that, I fold in the oats. The dough will feel thick—that’s exactly what you want.

I scoop out bigger portions than usual and place them on a baking sheet, giving them space because they spread a bit. Bake until the edges are set but the centers still look soft. They’ll firm up as they cool, so don’t wait for them to look fully done.

While they cool, I mix powdered sugar, milk, and vanilla until I get a thick glaze. Then I spread it over the cookies. It might look messy at first, but it sets into that slightly crackly top after a few minutes.

Things I Learned the Hard Way

• If the glaze is too thin, it just runs off—add more powdered sugar.
• Overbaking ruins the texture. Pull them out when they still look slightly underdone.
• Let the cookies cool before glazing or it melts right off.
• Bigger cookies work better here—small ones dry out faster.

Storage & Serving Suggestions
These keep well for about 3 days in a container at room temperature. The glaze will firm up but stays good. If they get a bit firm, a quick 10-second microwave brings them back.

Lyna Recipes

Crumbl-Style Iced Oatmeal Cookies (Thick and Chewy)

Thick and chewy oatmeal cookies topped with a sweet vanilla glaze, inspired by the popular bakery-style cookies.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 10 minutes mins

Total Time 25 minutes mins

Servings: 10 cookies

Ingredients Method Notes

Ingredients

  

Cookies:

• 1/2 cup butter softened
• 1/3 cup brown sugar
• 1/4 cup granulated sugar
• 1 egg
• 1 teaspoon vanilla extract
• 1 cup all-purpose flour
• 1/2 teaspoon baking soda
• 1/4 teaspoon salt
• 1/4 teaspoon cinnamon
• 1 pinch nutmeg
• 1 1/4 cups old-fashioned rolled oats

Glaze:

• 3/4 cup powdered sugar
• 1 1/2 tablespoons milk
• 1/2 teaspoon vanilla extract

Method

 

Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.

Cream butter, brown sugar, and granulated sugar until light and smooth.

Add egg and vanilla extract, mixing until fully combined.

In a separate bowl, whisk flour, baking soda, salt, cinnamon, and nutmeg.

Gradually mix dry ingredients into wet ingredients.

Fold in rolled oats until evenly combined.

Scoop large dough portions onto baking sheet, spacing them apart.

Bake for 10–12 minutes until edges are set and centers are soft.

Let cookies cool completely.

Mix powdered sugar, milk, and vanilla until smooth, then spread over cookies.

Notes

Do not overbake—cookies will continue to firm up after baking. Adjust glaze thickness by adding more powdered sugar if needed. Store in an airtight container for up to 3 days.