If you’d told me a jar of bubbling sourdough starter would end up in my cookie jar, I would’ve laughed. I mean, I used to think sourdough belonged strictly to bread and those overly serious bakers you see on TV. But you know what? When pandemic boredom struck, I found myself trying every way under the sun to use up my extra starter. Enter: Sourdough Snickerdoodle Cookies. Honestly, the first time I brought a batch to my book club, I thought the odd tang might get side-eyed… Instead, the whole plate vanished. My friend Sara even swiped the last one with a little guilty look (she always does that, though). So, make more than you think you’ll need. These are the real deal: soft, chewy, a little bit nostalgic, and with just enough zip form the starter to make them special without turning off the cookie purists.

Why You’ll Want to Make These

I make this when it’s raining or when I accidentally let my starter go an extra day and it smells exactly like a science experiment—these cookies somehow save it, and my mood. My family goes absolutely wild for them, even if they’re not “sourdough people.” (Except for my brother, but he doesn’t like anything unless it’s pizza.) And sometimes it’s a lifesaver to have a recipe that helps lessen the guilt of throwing out perfectly good discard. Plus, they’ve got that classic snickerdoodle cinnamon whiff that hits you when you open the cookie tin. Hey, if you’ve ever doubted a cookie recipe, try this one just for the tangy flavor alone.

What You’ll Need (And Some Swaps I’ve Tried)

1/2 cup (113g) unsalted butter, softened (I sometimes use salted if that’s all I’ve got, just skip the pinch of salt later.)
3/4 cup (150g) granulated sugar (my grandma swears by cane sugar, but I’m honestly not picky)
1 large egg (room temp is nice, but I almost always forget)
1/2 cup (120g) sourdough starter discard—unfed (can use active starter, but discard is what I’m usually trying to use up)
1 1/2 cups (190g) all-purpose flour (I sometimes sub half with white whole wheat—gives it a nuttier bite)
1 tsp cream of tartar (if you don’t have this, try a tiny squeeze of lemon juice, but it’s not quite the same—just saying!)
1/2 tsp baking soda
1/4 tsp salt (leave this out if you’re using salted butter)
2 tsp ground cinnamon, divided (you’ll use some for rolling at the end—don’t dump it all in!)
2 tbsp granulated sugar (for rolling—save this for later)
Optional: a hearty splash of vanilla extract (I never measure, but call it a teaspoon?)

How to Actually Make Sourdough Snickerdoodle Cookies

Cream together the butter and 3/4 cup sugar in a biggish bowl until it’s light and fluffy—use a mixer or just go hard with a wooden spoon if you need the arm workout.
Crack in the egg and plop in the sourdough discard. Toss in the vanilla if you’ve got it. Beat everything together until messy but combined. (This is where I usually sneak a taste—raw eggs be darned)
In a separate bowl, mix the flour, cream of tartar, baking soda, and salt. Add this dry bit to the wet stuff, mixing just until combined. Don’t overmix—it’ll look a tad sticky, and that’s fine.
Cover the bowl and pop it in the fridge for at least 30 minutes (or up to overnight if you get distracted and wander off). Chilling keeps things thick and chewy.
Preheat your oven to 350°F (180°C). Line a baking sheet with parchment, if you have it—I’ve done without, and had to wrestle cookies off the pan.
Mix the remaining 2 tablespoons sugar with 1 teaspoon cinnamon in a tiny bowl. Scoop out dough—about a heaping tablespoon per cookie—roll into balls, then roll those in the cinnamon-sugar until gloriously coated.
Plop the coated balls on your tray, keeping them a couple inches apart; they’ll spread a smidge. (Mine always look squished together and, no surprise, they bake into one mutant cookie—still tastes good!)
Bake for 10–12 minutes. The edges should look set, but let the centers stay soft—otherwise you’ll lose the chew. They firm up as they cool, promise.
Cool on the pan for 5 minutes, then transfer to a rack. Or, in my case, eat them hot and risk molten cinnamon tongue.

A Few Genuine (and Random) Notes

If your dough feels way sticky, actually, chilling longer fixes it—don’t add more flour unless you want puffy biscuits. Trust me.
I think they taste even better the next day, if you can wait that long. If not, me neither.
Sometimes the bottoms brown a little too much if you use a dark pan—if you’ve got a lighter one, use it.

Cookie Experiments That (Sort of) Worked

Once swapped half the butter for coconut oil—came out softer, but felt too coconutty for me. If that’s your jam, go for it.
Added orange zest in one batch; nobody noticed but me. Maybe double it if you’re into citrus?
Tried rye flour once. Let’s just say it was a bold choice, and not one I’ll repeat in a hurry.

Equipment You’ll Probably Need

Mixing bowls (or honestly, one big bowl if you don’t want to clean extra)
Hand or stand mixer (I often just use a rubber spatula and a bit of determination)
Baking sheet, parchment paper, cooling rack (But if you skip the rack, just slide cookies onto a clean towel)
Spoon or small scoop (I use my ice cream scooper—don’t judge)

If you’re missing a mixer, a fork and elbow grease works well enough. Might take longer though.

How to Store (If You Have Any Left)

Keep ’em in an airtight container for 2–3 days, but honestly, in my house they never last more than a day! If you do somehow have leftovers, a slice of bread in the container keeps them soft. Or freeze the dough balls—bake straight from frozen, just add a minute or two.

Our Favorite Ways to Eat These

I like them slightly warm, with coffee in the afternoon—sometimes I’ll dunk them right in. My kid swears they’re best with a scoop of vanilla ice cream on top (messy but, you know, childhood magic). For holidays, I pile them up and add a sprinkle of extra cinnamon on top just for looks.

What I Wish I’d Known: Little Cookie Lessons

I once tried skipping the chill step—ended up with super flat cookies. Live and learn.
Don’t try and bake too many trays at once; the ones on the bottom get burnt. (Even though you think you’re saving time. You’re not…)
Crowding the pan makes the edges stick together—annoying but not a tragedy.

Questions Real People (Like Me) Ask

Do I have to use sourdough discard? Nah, you can use active starter, but discard is what I’m always looking to use up.
Why are my cookies spreading too much? Could be your butter’s too soft, or the dough wasn’t chilled enough. Or maybe those sprouts of science in your starter—kidding!
Can these be made gluten-free? I haven’t tried, but a friend used a gluten-free blend and she said they were fine—just a little crumblier.
What if I don’t have cream of tartar? They won’t be exactly the same, but a splash of lemon juice or vinegar can mimic the tang. Or, honestly, just skip it and accept a more classic sugar cookie vibe.
Can I freeze the baked cookies? Yup! Though they’re best fresh, you can freeze them in zip bags for up to a month. Pop in the oven or let them thaw on the counter.
Do they really need to rest after baking? Maybe not, but I think the texture improves after a few hours. I rarely wait, though.

And there you have it! I know this was a bit of a ramble—sometimes recipes come with stories and a few kitchen battles. If you give these Sourdough Snickerdoodle Cookies a whirl, let me know what experiments you try. And hey, save me one, if you can.

Sourdough Snickerdoodle Cookies