Equipment
Ingredients
Caramelized Onions
- 2 yellow onion, thinly sliced
- 15 g unsalted butter
- 15 ml olive oil
- 2 g salt
- 5 ml balsamic vinegar
- 2 g fresh thyme, finely chopped
Biscuit Dough
- 250 g all-purpose flour
- 15 g baking powder
- 2 g baking soda
- 4 g salt
- 115 g unsalted butter, frozen solid
- 180 ml buttermilk, ice cold
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 273 kcal
- Protein
- 5 g
- Carbohydrates
- 29 g
- Fat
- 16 g
- Fiber
- 2 g
- Sugar
- 3 g
- Sodium
- 596 mg
- Saturated Fat
- 9 g
- Monounsaturated Fat
- 5 g
- Polyunsaturated Fat
- 1 g
- Cholesterol
- 36 mg
- Potassium
- 129 mg
- Calcium
- 155 mg
- Iron
- 0.7 mg
- Magnesium
- 14 mg
- Phosphorus
- 110 mg
- Zinc
- 0.4 mg
- Vitamin A
- 115 mcg
- Vitamin C
- 3 mg
- Vitamin E
- 0.7 mg
- Vitamin K
- 3 mcg
- Vitamin B6
- 0.1 mg
- Vitamin B12
- 0.1 mcg
- Thiamin
- 0.06 mg
- Riboflavin
- 0.06 mg
- Niacin
- 0.5 mg
- Folate
- 17 mcg
- Water
- 61 g
Sources: USDA FoodData Central
Method
Melt 15g of unsalted butter with the olive oil in a large skillet over medium-low heat. Add the sliced onions and 2g of salt.
Cook the onions slowly, stirring occasionally, until deeply golden brown and reduced in volume. Stir in the fresh thyme and balsamic vinegar during the last minute of cooking.
Transfer the caramelized onions to a small plate, spread them into a thin layer, and place in the refrigerator to chill completely before adding to the dough.
Preheat the oven to 220 C / 425 F. Line a baking sheet with parchment paper.
In a large mixing bowl, thoroughly whisk together the all-purpose flour, baking powder, baking soda, and the remaining 4g of salt.
Grate the frozen unsalted butter directly into the flour mixture using the large holes of a box grater. Toss the butter shreds in the flour occasionally to prevent clumping.
Gently toss the chilled caramelized onions into the flour and butter mixture until the onion pieces are evenly coated and dispersed.
Pour in the cold buttermilk. Stir gently with a wooden spoon or spatula just until a shaggy, rough dough forms. Do not overmix.
Turn the dough out onto a lightly floured surface. Pat it gently into a rectangle, then fold it in half over itself. Repeat this folding process two more times to build flaky layers.
Pat the folded dough out to an even thickness of about 2.5 centimeters. Press a biscuit cutter straight down into the dough to cut out biscuits. Do not twist the cutter.
Place the cut biscuits onto the prepared baking sheet so their edges are just touching. Bake at 220 C / 425 F for 12 to 15 minutes.
Remove from the oven and allow the biscuits to rest on the baking sheet for 5 minutes before transferring to a wire rack.
Chef's Notes
- Grating frozen butter is a game-changing technique. It creates perfectly sized fat pockets throughout the dough without requiring the heat-generating friction of rubbing it in by hand.
- Baking biscuits close together on the pan forces them to climb up rather than spread out, resulting in a taller, fluffier final product.
- Patience is non-negotiable for the onions. Cooking them too fast will burn them rather than drawing out their natural sugars for true, sweet caramelization.
- To get a beautiful glossy finish, brush the tops of the raw biscuits with a splash of heavy cream or extra buttermilk right before baking.
Storage
Refrigerator: 4 days — Store in an airtight container.
Freezer: 3 months — Freeze baked biscuits tightly wrapped, or freeze raw cut biscuits to bake fresh later.
Reheating: Warm in a 175 C / 350 F oven for 5 to 8 minutes until heated through.
Troubleshooting
Tough, dense biscuits without visible layers.
Cause: The dough was overworked, or the butter melted before entering the oven.
Fix: Cannot be fixed.
Prevention: Handle the dough as little as possible. Ensure the butter, buttermilk, and caramelized onions are ice cold when mixing.
Biscuits are lopsided or did not rise straight up.
Cause: Twisting the biscuit cutter while cutting the dough, which seals the edges.
Fix: Cannot be fixed.
Prevention: Press the biscuit cutter straight down and pull it straight up.
Cultural Context
Biscuits are a cornerstone of American Southern baking, traditionally relying on cultured buttermilk and cold solid fat for their signature tender crumb and layered lift. Incorporating slow-cooked, French-style caramelized onions bridges rustic comfort food with sophisticated culinary technique, transforming this humble bread into an elevated centerpiece perfectly suited for autumn weather.
