Glazed Lemon Oatmeal Cookies with Vanilla Bean Icing
What I Love About My Lemon Vanilla Oatmeal Cookies
These cookies share the same soft, chewy base as my cinnamon oatmeal cookies. Lemon zest and vanilla bean glaze give them a completely different personality for spring.
- You get a soft, chewy texture in every cookie thanks to old-fashioned oats.
- I use fresh zest from one and a half lemons, so citrus flavor comes through in every bite.
- The glaze stays soft and glossy since it’s made with real vanilla bean and heavy cream.
- This dough comes together in one bowl, so you’ll have warm cookies ready in about 20 minutes.
Table of Contents
Key Ingredient Notes
- Old-Fashioned Oats – I don’t recommend swapping in quick oats or instant oats. They’re cut smaller, so the cookies can turn out finer and more crumbly rather than soft and chewy.
- Fresh Lemon Zest – Zest carries the lemon’s essential oils, so it gives a much brighter citrus flavor than extract. Zest one and a half lemons for the dough and another half lemon for the glaze.
- Vanilla Bean – A whole vanilla bean gives the glaze real flecks and a deeper flavor than extract alone. If you don’t have a whole bean on hand, swap in a teaspoon of vanilla bean paste or a good pure vanilla extract.
- Butter – Make sure it’s truly at room temperature before you start creaming it. Butter that’s too soft or melted will make the dough spread more than it should in the oven.
See recipe card for complete information on ingredients and quantities.
How to Make Lemon Vanilla Oatmeal Cookies
- Cream the butter and both sugars. Beat the butter alone first until light and fluffy, then add both sugars and beat for another minute.
- Add the eggs one at a time. Mix well after each egg and scrape down the bowl so everything blends evenly.
- Mix in the dry ingredients. Add the vanilla extract, flour, baking soda, and salt, then mix on low speed just until incorporated. PRO TIP: I stop mixing as soon as the flour streaks disappear, since overmixing here toughens the cookie.
- Fold in the oats and lemon zest. Keep the mixer on low so the oats stay whole and the zest spreads evenly through the dough.
- Scoop and shape the cookies. Roll the dough into balls about an inch across, then press each one down lightly on the baking sheet.
- Bake until just set. Bake at 350°F for 9 to 11 minutes, until edges look set but centers still look a touch soft.
- Make the glaze while the cookies bake. Scrape the vanilla bean seeds into the heavy cream and warm the cream gently. Whisk it into the powdered sugar and lemon zest until smooth.
- Glaze the cookies while they’re warm. PRO TIP: I drizzle the glaze on right after the cookies come out of the oven. It sets up thinner and glossier on warm cookies than on cooled ones.
How to Know When Lemon Oatmeal Cookies Are Done
The cookies are done when the edges turn light golden and the centers still look slightly soft and underbaked. They firm up as they cool on the pan, so pulling them a minute early keeps them softer and chewier. If the edges turn deep brown, the cookies will bake up dry and crisp instead of soft.
How to Store, Freeze, and Reheat Lemon Oatmeal Cookies
- Store glazed: in the refrigerator, in an airtight container, for up to 5 days. Since the glaze is made with heavy cream, I don’t recommend leaving these cookies out at room temperature for long. As a food safety certified chef, I’d rather you refrigerate them than risk it.
- Store not glazed: unglazed, plain cookies are fine at room temperature for up to a week, in a closed container. I place parchment paper between layers to keep the cookies from sticking. Remember that humid climate affects shelf life at room temperature.
- Freeze: it’s best to freeze unglazed cookies for the best texture. Cool them completely and freeze in a single layer until solid. Then transfer to a freezer bag for up to 3 months.
- Reheat: let refrigerated cookies sit at room temperature for about 20 minutes before serving, so the glaze softens back up. A few seconds in the microwave works too, but the glaze can turn sticky if you go too long.
Lemon Vanilla Oatmeal Cookies Recipe FAQs
Cookies usually spread too much when the butter is too warm. This also happens when the dough goes into a hot pan straight from a previous batch. Make sure the butter is just softened, not melted, and let your baking sheet cool between batches. If your cookies spread more than you’d like, pop the scooped dough in the fridge for 15 minutes before baking. This helps them hold their shape better.
Quick oats are cut smaller and thinner than old-fashioned oats. They soak up moisture faster, which can leave the cookies fine and a little crumbly. I always use old-fashioned oats in this recipe for the sturdier, chewier texture. If quick oats are all you have, the cookies will still taste fine. They just won’t have quite the same hearty bite.
Not quite as well, in my experience. Lemon zest holds the essential oils from the peel, which gives a brighter, truer citrus flavor than extract. If you’re out of fresh lemons, extract will still give you some lemon flavor. I’d treat it as a backup though, not a replacement for the fresh zest this recipe calls for.
This dough holds up well in the refrigerator for 2 to 3 days before baking, tightly covered. When you’re ready to bake, let the dough sit out for about 10 minutes so it’s easier to scoop. Then bake as directed. I don’t recommend making the glaze ahead of time. It’s best fresh, whisked together right before you drizzle it on.
More Recipes From Me
- Soft Almond Butter Oatmeal Cookies
- Dulce de Leche Apple Caramel Oatmeal Cookies
- Apple Crisp
- Asian Pear Maple Crisp
- Blueberry Crisp
- Coconut Oat Muffins
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Glazed Lemon Oatmeal Cookies Recipe
Ingredients
Cookies:
- 1 cup unsalted butter room temperature
- 1/2 cup brown sugar
- 1/2 cup white granulated sugar
- 2 eggs room temperature
- 1 1/4 cup all purpose flour
- 2 tsp vanilla extract
- 1 tsp baking soda
- 1/8 tsp salt
- 3 cups old fashioned oats
- Zest from 1 1/2 lemons
Glaze:
- 1 vanilla bean
- 1 cup powdered sugar
- 2 1/2 Tbsp heavy whipping cream
- Zest from 1/2 lemon
Instructions
- Preheat oven to 350℉ and line a cookie baking sheet with parchment paper.
- Beat butter on medium-high speed until light and fluffy. Add both sugars and beat for another minute.
- Add eggs, one at a time, mixing well after each addition. Scrape sides and bottom of the bowl.
- Add vanilla extract, flour, baking soda and salt. Mix it in on low speed just until incorporated.
- Add oats, while still on low speed, just until incorporated.
- Add lemon zest and mix until evenly mixed throughout.
- Scoop cookie dough and roll about an inch sized balls. Place cookies on parchment paper, about two inches apart. Press very lightly to flatten cookies just a little bit.
- Bake for 9-11 minutes.
- While cookies are baking, prepare the glaze. Scrape vanilla bean seeds into heavy cream and mix well. Warm up heavy cream but not too hot. Add powder sugar to a shallow bowl and add lemon zest. Whisk in heavy cream mixture slowly, until all smooth. Drizzle warm cookies.
Notes
- No whole vanilla bean on hand? Use 1 tsp vanilla bean paste or just 1 tsp pure vanilla extract in the glaze instead.
- Old-fashioned oats are best here. Quick oats or instant oats will work in a pinch, but the texture will be changed, finer and less chewy.
- Make sure butter is fully at room temperature before creaming, not melted, so the dough doesn’t spread too much.
- Drizzle the glaze while the cookies are still warm for the smoothest, glossiest finish.
Nutrition
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Disclaimer: Nutrition information shown is not guaranteed to be 100% accurate as most ingredients and brands have variations.
Yum!! They look so good and the lemon so refreshing. I’ve always enjoyed baking cookies for my kids. I just made some for the blog and the grandkids got to be my quality control — they loved them. I’ve got orders for more batches when we leave Saint Simons Island but I think I’ll make a batch of the glazed lemon vanilla oatmeal cookies to go along. They are three growing boys who LOVE to eat. Oh!! I’m counting — four more months until I can buy your cookbook for my birthday 🙂 I’m really looking forward to it.