These sourdough discard cinnamon rolls are soft, buttery, and perfectly spiced, with a sweet vanilla glaze that makes them irresistible. Made overnight with unfed sourdough starter, they require no yeast and no second rise—just mix, ferment, roll, bake, and enjoy! Ideal for holiday mornings or weekend breakfasts, they’re a delicious way to use your sourdough discard while treating your family to bakery-quality rolls.
1tablespoon + 1 teaspoon honey ((25g); or granulated sugar)
0.75teaspoon fine sea salt ((4g))
Leavening (added next morning)
1teaspoon baking powder
0.5teaspoon baking soda
Cinnamon-Sugar Filling
0.75cup light brown sugar ((150g))
2teaspoons ground cinnamon
4tablespoons butter (melted (56g))
Cinnamon Roll Glaze
1tablespoon butter (melted (14g))
1cup powdered sugar ((120g))
1teaspoon vanilla extract ((5g))
2tablespoons milk ((30g))
Instructions
Night Before
1
Mix the doughGrate cold butter into a large bowl. Add flour and use a bench scraper or pastry cutter to cut butter into flour until pea-sized crumbs form. Add sourdough discard, buttermilk, honey, and salt. Mix with a spatula until combined. Do NOT add baking powder or soda yet.
2
Bulk fermentationCover bowl with a lid or cloth and let rest at room temperature (68–70°F / 20–21°C) for 10–12 hours.
If kitchen is warmer (>75°F), reduce time to 7–8 hours.
Next Morning
3
Add leavening & preheatSprinkle baking powder and baking soda over dough. Mix thoroughly with hands until fully incorporated. Preheat oven to 375°F (190°C). Butter a 12" cast iron skillet.
4
Roll out doughGenerously flour work surface. Turn dough out and roll into a 12" x 24" rectangle, about ¼" thick.
Use extra flour if sticky.
5
Add fillingBrush dough with melted butter. Sprinkle cinnamon-sugar mixture evenly, leaving a ½" border.
6
Roll & cutRoll tightly from the long edge into a log. Cut into 12 equal slices (~1½" each) using a bench scraper, dental floss, or sharp knife.
7
BakeArrange rolls in skillet with space between. Bake 35–40 minutes until golden brown.
If using glass dish, add 5–10 minutes.
8
GlazeWhile rolls bake, whisk melted butter, powdered sugar, vanilla, and milk until smooth. Pour over hot rolls immediately after baking.
Nutrition Facts
Servings 12
Amount Per Serving
Calories320kcal
% Daily Value *
Total Fat12gg19%
Saturated Fat7gg35%
Trans Fat0gg
Cholesterol30mgmg10%
Sodium280mgmg12%
Potassium120mgmg4%
Total Carbohydrate48gg16%
Dietary Fiber1gg4%
Sugars22gg
Protein5gg10%
Calcium 80 mg
Iron 1.5 mg
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.
Note
Active starter option: Use 100g active starter and skip baking powder/soda. Let rolls rise 1–1.5 hours before baking.
Warmer kitchens: Reduce buttermilk to ¾ cup (180g) and increase flour to 2¾ cups (345g) to prevent stickiness.
Freezing: Freeze baked (un-glazed) or unbaked rolls for up to 3 months. Bake from frozen at 350°F for 40–45 min.
Pan alternatives: Use a 9×13" dish, springform pan, or baking sheet if no cast iron skillet is available.