Soft, chewy, and filled with the perfect balance of tart rhubarb and warm cinnamon, these Rhubarb Oatmeal Cookies are one of my favorite homemade treats. I love how the hearty oats create a satisfying texture while the fresh rhubarb adds a bright, tangy flavor that makes every bite memorable. Whether I bake them for an afternoon snack, dessert, or to share with family and friends, these cookies always disappear quickly.
Why I’ll Love This Recipe
I love how these cookies come together with simple pantry staples and fresh rhubarb. The combination of chewy oats, buttery cookie dough, and warm cinnamon creates a comforting flavor that feels homemade in every bite. I also appreciate that they stay soft for days, making them perfect for preparing ahead. Whether I enjoy them with a cup of coffee or serve them as a sweet afternoon snack, they always satisfy my craving for a cozy homemade dessert.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
1 cup all-purpose flour
1/2 teaspoon baking soda
1/2 teaspoon cinnamon
1/4 teaspoon salt
1 cup old-fashioned rolled oats
1/2 cup unsalted butter, softened
1/2 cup brown sugar
1/4 cup granulated sugar
1 large egg
1 teaspoon vanilla extract
1 cup finely diced rhubarb
Directions
I preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.
I whisk together the flour, baking soda, cinnamon, and salt in a medium bowl.
Then I stir the rolled oats into the flour mixture and set it aside.
In a large bowl, I cream the softened butter, brown sugar, and granulated sugar until the mixture becomes light and fluffy.
I beat in the egg and vanilla extract until everything is fully combined.
I gradually mix the dry ingredients into the wet ingredients until a soft dough forms.
Next I gently fold in the diced rhubarb, making sure it is evenly distributed throughout the dough.
I drop rounded tablespoons of dough onto the prepared baking sheet, leaving about 2 inches between each cookie.
Then I bake the cookies for 10–12 minutes, or until the edges are lightly golden.
I let the cookies cool on the baking sheet for about 5 minutes before transferring them to a wire rack to cool completely.
Servings and Timing
Prep Time: 15 minutes
Cook Time: 12 minutes
Total Time: 27 minutes
Servings: 18 cookies
Calories: Approximately 135 kcal per serving
Variations
I sometimes add chopped walnuts or pecans for extra crunch and a nutty flavor. When I want a sweeter cookie, I mix in white chocolate chips, which pair beautifully with the tart rhubarb. I also enjoy adding a pinch of nutmeg or ground ginger alongside the cinnamon for extra warmth. For a heartier texture, I occasionally replace a portion of the all-purpose flour with whole wheat flour. If I have orange zest on hand, I grate a little into the dough to brighten the overall flavor.
Storage/Reheating
I store the cooled cookies in an airtight container at room temperature for up to 4 days. For longer storage, I freeze them in a freezer-safe container or bag for up to 3 months. When I want to enjoy a frozen cookie, I let it thaw at room temperature or warm it in the microwave for about 10–15 seconds to bring back its soft, freshly baked texture.
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FAQs
Can I use frozen rhubarb?
I can use frozen rhubarb, but I thaw and drain it well before adding it to the dough to prevent excess moisture.
Can I make the dough ahead of time?
Yes, I can prepare the dough and refrigerate it for up to 24 hours before baking.
Why are my cookies too soft?
The cookies continue to set as they cool, so I remove them from the oven when the edges are lightly golden while the centers still look slightly soft.
Can I substitute quick oats for rolled oats?
I can, but I prefer rolled oats because they provide a chewier texture and better overall structure.
Can I freeze the cookie dough?
Yes, I portion the dough into individual scoops and freeze them. When I’m ready to bake, I simply add an extra minute or two to the baking time without thawing.
Conclusion
I love making these Rhubarb Oatmeal Cookies because they combine wholesome oats, buttery sweetness, tart rhubarb, and warm cinnamon into one comforting treat. They are easy to prepare, perfect for sharing, and just as delicious with a hot cup of coffee as they are packed into a lunchbox. Whenever I have fresh rhubarb on hand, this recipe is one I happily return to again and again.
📖 Recipe:
Print
Rhubarb Oatmeal Cookies
- Total Time: 27 minutes
- Yield: 18 cookies
- Diet: Vegetarian
Description
Soft, chewy Rhubarb Oatmeal Cookies combine hearty rolled oats, tart fresh rhubarb, and warm cinnamon for a comforting homemade treat. They’re easy to make and stay tender for days, making them perfect for snacking or sharing.
Ingredients
1 cup all-purpose flour
1/2 teaspoon baking soda
1/2 teaspoon cinnamon
1/4 teaspoon salt
1 cup old-fashioned rolled oats
1/2 cup unsalted butter, softened
1/2 cup brown sugar
1/4 cup granulated sugar
1 large egg
1 teaspoon vanilla extract
1 cup finely diced rhubarb
Instructions
- Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.
- Whisk together the flour, baking soda, cinnamon, and salt in a medium bowl.
- Stir the rolled oats into the flour mixture.
- Cream the softened butter, brown sugar, and granulated sugar until light and fluffy.
- Beat in the egg and vanilla extract until fully combined.
- Gradually mix the dry ingredients into the wet ingredients until a soft dough forms.
- Fold in the diced rhubarb until evenly distributed.
- Drop rounded tablespoons of dough onto the prepared baking sheet, leaving about 2 inches between each cookie.
- Bake for 10–12 minutes, or until the edges are lightly golden.
- Cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.
Notes
Add chopped walnuts or pecans for extra crunch.
White chocolate chips pair well with the tart rhubarb.
Add a pinch of nutmeg or ground ginger for extra warmth.
Replace part of the all-purpose flour with whole wheat flour for a heartier texture.
Orange zest adds a bright citrus flavor.
Store in an airtight container at room temperature for up to 4 days.
Freeze baked cookies for up to 3 months or freeze portioned dough and bake from frozen, adding 1–2 minutes to the baking time.
Frozen rhubarb can be used if thawed and well drained.
- Prep Time: 15 minutes
- Cook Time: 12 minutes
- Category: Dessert
- Method: Bake
- Cuisine: American
Nutrition
- Serving Size: 1 cookie
- Calories: 135 kcal
- Sugar: 10 g
- Sodium: 90 mg
- Fat: 6 g
- Saturated Fat: 3.5 g
- Unsaturated Fat: 2 g
- Trans Fat: 0 g
- Carbohydrates: 19 g
- Fiber: 1 g
- Protein: 2 g
- Cholesterol: 20 mg
