Step 1: Prepare the Oven
Preheat your oven to 350°F (175°C).
Line baking sheets with parchment paper or silicone baking mats.
Step 2: Mix the Dry Ingredients
In a medium bowl, whisk together:
Flour
Rolled oats
Baking soda
Baking powder
Cinnamon
Nutmeg (if using)
Salt
Set aside.
Step 3: Cream the Butter and Sugars
In a large bowl, beat the softened butter, brown sugar, and granulated sugar for 2–3 minutes, until light and fluffy.
Step 4: Add the Egg and Vanilla
Beat in the egg until fully incorporated.
Mix in the vanilla extract.
Step 5: Combine Wet and Dry Ingredients
Gradually add the dry ingredients to the butter mixture.
Mix just until combined. Avoid overmixing.
Step 6: Fold in the Rhubarb
Using a rubber spatula, gently fold in:
Diced rhubarb
Nuts (if using)
White chocolate chips (if using)
Coconut (if using)
The dough will be thick.
Step 7: Shape the Cookies
Scoop about 2 tablespoons of dough for each cookie and place them 2 inches apart on the prepared baking sheets.
Lightly flatten each mound with the back of a spoon.
Step 8: Bake
Bake for 12–15 minutes, or until:
The edges are lightly golden.
The centers are set but still soft.
Do not overbake, as the cookies will continue to firm up while cooling.
Step 9: Cool
Let the cookies cool on the baking sheet for 5 minutes.
Transfer to a wire rack to cool completely.
Serving Suggestions
Enjoy these cookies:
Warm with a glass of milk
With coffee or hot tea
As a lunchbox treat
Crumbled over vanilla yogurt
Alongside vanilla ice cream for dessert
Optional Variations
Strawberry Rhubarb Cookies
Add ½ cup finely diced fresh strawberries and reduce the rhubarb to 1 cup.
Ginger Spice
Mix in ½ teaspoon ground ginger for extra warmth.
Lemon Rhubarb
Add 1 tablespoon grated lemon zest for a bright citrus flavor.
Raisin Oatmeal
Replace the nuts with ½ cup raisins or dried cranberries.
Chocolate Lovers
Use dark or milk chocolate chips instead of white chocolate.
Tips for Success
Pat the diced rhubarb dry with paper towels if it’s very juicy to prevent excess moisture.
Chill the dough for 20–30 minutes if it feels too soft.
Use a cookie scoop for evenly sized cookies.
Don’t overmix once the flour is added, or the cookies may become tough.
Bake one tray at a time for the most even results.
Storage
Room Temperature
Store in an airtight container for up to 4 days.
Refrigerator
Keep in an airtight container for up to 1 week.
Freezer
Freeze baked cookies or unbaked cookie dough for up to 3 months.
Nutrition Information (Approximate Per Cookie)
Calories: 165
Protein: 3g
Fat: 7g
Carbohydrates: 23g
Fiber: 2g
Sugar: 11g
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