Sourdough Discard Chocolate Chip Cookie Bars
If you’ve been staring at that sourdough discard in your fridge wondering if you should toss it… don’t.
Because what most people don’t realize is that sourdough discard isn’t just “leftover starter”, it’s the secret to some of the softest, richest, and easiest desserts you can make at home.
And if you’re anything like me, you want something that feels a little homemade, a little indulgent… but still simple enough to throw together without overthinking it.
These sourdough discard cookie bars are soft, gooey, packed with chocolate, and come together with basic pantry ingredients—no complicated steps, no waste, and no stress.
So instead of throwing it away… let’s turn it into something you’ll actually crave.
Soft, gooey sourdough discard cookie bars loaded with chocolate chips and baked to golden perfection.
Ingredients
1 cup sourdough discard
½ cup melted butter
¾ cup brown sugar
¼ cup sugar
1 egg
1 tsp vanilla
1 ½ cups flour
½ tsp baking soda
½ tsp salt
1 cup chocolate chips
Tools That Make This Recipe Easier
You don’t need anything fancy, but these three are worth having—they make baking easier now and you’ll use them over and over again:
Silicone baking mat – keeps everything from sticking, replaces parchment paper, and cleans up in seconds
8x8 or 9x9 baking pan – gives you that perfect soft, gooey center with evenly baked edges
Wide spatula – lifts bars cleanly without breaking them apart
💡 These are the kind of simple kitchen staples you buy once and end up using every single week.
1. Preheat + Prep
Preheat your oven to 350°F and lightly grease or line an 8x8 or 9x9 baking pan with parchment paper.
👉 Tip: parchment = easy removal and cleaner cuts
2. Melt + Mix the Base
In a large bowl, whisk together:
melted butter
brown sugar
granulated sugar
Mix until smooth and glossy (about 30–60 seconds).
👉 You’re looking for a slightly thick, shiny mixture—not grainy
3. Add Wet Ingredients
Stir in:
egg
vanilla
sourdough discard
Mix until fully combined.
👉 It might look a little loose or slightly tangy-smelling—that’s normal
4. Add Dry Ingredients
Add:
flour
baking soda
salt
Gently mix until just combined. Do NOT overmix — this is what keeps them soft.
👉 Stop when no dry streaks remain
5. Fold in Chocolate Chips
Stir in chocolate chips until evenly distributed.
👉 At this point the dough should be thick, scoopable, and slightly sticky
6. Press Into Pan
Transfer dough into your prepared pan and press it evenly into the corners.
👉 Lightly wet your hands or use a spatula so it doesn’t stick
7. Bake
Bake for 20–25 minutes, until:
edges are golden
center looks slightly soft (not wet)
Do NOT over-bake—this is what keeps them gooey
8. Cool (Important)
Let cool for at least 15–20 minutes before slicing
👉 They’ll continue setting as they cool
9. Slice + Serve
Cut into squares and enjoy warm or room temp.
👉 Optional: sprinkle a little flaky salt on top for bakery-style flavor
Quick Tips for Perfect Cookie Bars
Use room temp egg for better mixing
Slightly underbake for soft centers
Let cool fully if you want clean cuts
Add nuts or swap chocolate chips if desired
Common Mistakes to Avoid
Over-baking → dry bars
Over-mixing → dense texture
Skipping parchment → messy removal
