Best Sourdough Oatmeal Raisin Cookies Recipe

I am obsessed with these sourdough oatmeal raisin cookies because they actually taste like real bread and cookie had a bold, delicious argument. I love the tang from sourdough starter discard and the chewy, toothsome bite of old fashioned rolled oats.

They are sweet without being sickly, spiced just enough to make your teeth notice. But the thing that gets me every time is texture: crisp edges, tender middle.

I find myself stealing one, then another. No regrets.

Just cookie crumbs and a ridiculous smile. I want more.

Perfect for fall parties, and yes, I bring a plate every time.

Ingredients

• All-purpose flour: the sturdy backbone, gives structure and holds everything together.
• Baking soda: makes them lift a bit, light and not brick-like.
• Ground cinnamon: warm spice hit, smells cozy and homey.
• Kosher salt: balances sweet, makes flavors pop like it should.
• Ground nutmeg optional: subtle warm note, use sparingly for depth.
• Unsalted butter softened: richness and tender crumb, it’s where flavor lives.
• Light brown sugar: molasses-y sweetness, keeps cookies chewy and moist.
• Granulated sugar: gives tiny crisp edges, just a little crunch.
• Sourdough starter discard room temp: tangy complexity, adds personality without work.
• Large egg: binds everything together, gives structure and slight lift.
• Vanilla extract: cozy fragrance, makes it all taste like home.
• Old fashioned rolled oats: hearty chew and texture, you’ll hear it.
• Raisins: sweet, chewy pockets in every bite, classic comfort.
• Chopped walnuts or pecans optional: crunchy contrast, a little savory bite.

Ingredient Quantities

• 1 1/2 cups all purpose flour
• 1 teaspoon baking soda
• 1 teaspoon ground cinnamon
• 1/2 teaspoon kosher salt
• 1/4 teaspoon ground nutmeg optional
• 1/2 cup unsalted butter softened
• 1/2 cup packed light brown sugar
• 1/4 cup granulated sugar
• 1/2 cup sourdough starter discard room temperature
• 1 large egg
• 1 teaspoon vanilla extract
• 1 1/2 cups old fashioned rolled oats
• 1 cup raisins
• 1/2 cup chopped walnuts or pecans optional

How to Make this

1. Preheat oven to 350°F and line baking sheets with parchment paper.

2. In a medium bowl whisk together 1 1/2 cups all purpose flour, 1 teaspoon baking soda, 1 teaspoon ground cinnamon, 1/2 teaspoon kosher salt, and 1/4 teaspoon ground nutmeg if using.

3. In a large bowl cream 1/2 cup softened unsalted butter with 1/2 cup packed light brown sugar and 1/4 cup granulated sugar until light and fluffy.

4. Beat in 1/2 cup room temperature sourdough starter discard, 1 large egg, and 1 teaspoon vanilla extract until well combined.

5. Gradually add the dry ingredients to the wet mixture and mix until just combined.

6. Stir in 1 1/2 cups old fashioned rolled oats, 1 cup raisins, and 1/2 cup chopped walnuts or pecans if using, until evenly distributed.

7. Scoop dough by rounded tablespoon or using a cookie scoop onto prepared sheets, spacing cookies about 2 inches apart.

8. Bake for 10 to 12 minutes, until edges are set and tops are lightly golden.

9. Let cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.

Equipment Needed

1. Oven and baking sheet(s) lined with parchment paper
2. Medium and large mixing bowls
3. Whisk for dry ingredients
4. Electric hand mixer or stand mixer with paddle attachment
5. Measuring cups and spoons
6. Rubber spatula or wooden spoon for folding
7. Tablespoon or cookie scoop for portioning
8. Wire cooling rack

FAQ

Best Sourdough Oatmeal Raisin Cookies Recipe Substitutions and Variations

• All purpose flour: swap for whole wheat pastry flour 1:1 for a nuttier flavor or use a gluten free all purpose blend 1:1 for gluten free cookies
• Unsalted butter softened: use equal amount vegan butter or refined coconut oil for dairy free results
• Sourdough starter discard 1/2 cup: replace with 1/2 cup plain yogurt or 1/2 cup unsweetened applesauce; yogurt keeps tang, applesauce adds moisture and reduces fat
• Raisins 1 cup: substitute dried cranberries, chopped dates, or chopped apricots 1:1 for different fruit flavors

Pro Tips

1. If your starter discard is very wet, stir off any excess liquid or use a slightly smaller scoop so the dough does not become too loose. A thicker discard gives better texture and helps the cookies hold their shape.

2. Chill the dough for 20 to 30 minutes before baking. It firms the butter, concentrates the flavors, and reduces spreading so you get chewier centers and nicely defined edges.

3. Toast the oats and nuts briefly in a dry skillet until fragrant, then cool before mixing in. That step adds a deeper, nuttier flavor and a better toasted note in each bite.

4. If your raisins are dry, soak them in hot water or warm rum for 10 minutes, drain well, then toss with a few tablespoons of flour. This prevents them from pulling moisture out of the dough and keeps them plump in the baked cookies.

5. Take the cookies out when the edges are set but the centers still look slightly underbaked. They will finish on the hot sheet and remain soft. Cool on the sheet 5 minutes before transferring to a rack, then store in an airtight container with a slice of bread to keep them soft longer.