Cast-Iron Sweet Potato Crust Quiche with Smoked Bacon, Mustard Greens & Sharp Cheddar
Sunday mornings in my grandmother's Atlanta kitchen always smelled of woodsmoke and sweet potatoes roasting in the embers. Years later, while staging in Charleston, I watched a line cook press grated potatoes into a screaming-hot cast-iron skillet and had a flash of inspiration. Why not marry those two memories? That is how this cast-iron sweet potato crust quiche was born. The secret is getting that cast-iron skillet ripping hot so the shredded sweet potatoes form a crisp, caramelized, rustic shell that holds up to a velvety buttermilk and egg custard. I stud mine with thick-cut smoky bacon, tender peppery mustard greens from the farmer's market, and sharp Southern white cheddar that melts into rich pockets of goodness. It is a showstopper that bridges heritage tradition with modern technique. If you want to make it your own, swap the mustard greens for collards or kale, or use a good gouda if cheddar is not your thing. Every time I pull this heavy skillet from the oven, I hear my grandmother telling me that food is just history you can taste. Gather your people close for this one.
Featured Recipe
Cast-Iron Sweet Potato Crust Quiche with Smoked Bacon, Mustard Greens & Sharp Cheddar
Crisp, caramelized shredded sweet potatoes form a rustic, golden crust in a screaming-hot cast-iron skillet. Filled with a velvety buttermilk egg custard studded with smoky thick-cut bacon, tender peppery mustard greens, and sharp Southern white cheddar, this showstopper brings heritage Sunday morning warmth to the breakfast table.
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Timeline
Ingredients
- 2 large sweet potatoes(peeled and coarsely shredded (about 4 cups shredded))
- 3 tbsp unsalted butter(melted, divided)
- 1 tbsp cornstarch(helps bind and crisp the crust)
- 1.5 tsp kosher salt(divided)
- 0.75 tsp black pepper(freshly cracked, divided)
- 6 slices thick-cut smoked bacon(chopped into 1/2-inch pieces)
- 3 cups mustard greens(stemmed and sliced into thin ribbons)
- 2 cloves garlic(minced)
- 1 tsp apple cider vinegar(for deglazing greens)
- 6 large eggs(room temperature)
- 0.75 cup heavy cream
- 0.5 cup whole buttermilk(shaken well)
- 0.125 tsp ground nutmeg(freshly grated preferred)
- 0.5 tsp hot sauce(Louisiana-style, such as Crystal)
- 1.5 cups extra-sharp white cheddar cheese(freshly grated, divided)
- 2 scallions(thinly sliced, for garnish)
Instructions
- 1
Toss 2 large sweet potatoes, shredded, with 0.5 tsp kosher salt in a large colander. Let sit for 5 minutes, then wrap the sweet potato shreds securely in a clean kitchen towel and wring out as much moisture as humanly possible over the sink.
10 min
Tip: Getting the shreds bone-dry is the secret to a shatteringly crisp cast-iron crust rather than a soggy bottom.
- 2
Position an oven rack in the lower third and preheat the oven to 400°F (200°C). Place a 10-inch or 12-inch seasoned cast-iron skillet inside the cold oven to heat up with 1 tbsp unsalted butter brushed inside.
5 min
Tip: Preheating the skillet ensures the sweet potato begins frying and caramelizing the second it hits the iron.
- 3
Transfer the dry shredded sweet potatoes to a bowl and toss thoroughly with 2 tbsp unsalted butter, melted, 1 tbsp cornstarch, and 0.25 tsp black pepper. Carefully remove the smoking-hot skillet from the oven. Tip the sweet potato mixture into the skillet and firmly press it across the bottom and 1.5 inches up the sloping sides using the flat bottom of a drinking glass.
5 min
Tip: Press tightly and evenly. An even thickness prevents scorched rim edges before the center is crisp.
- 4
Slide the skillet back into the 400°F oven and par-bake until the top perimeter edges are deeply browned and crisp and the bottom is firm and fragrant.
20 min
Tip: If the rim edges brown too quickly around minute 15, gently lay a ring of aluminum foil over the top rim.
- 5
While the crust bakes, set a separate skillet over medium heat and render 6 slices thick-cut smoked bacon until crisp and golden brown, about 7 minutes. Transfer bacon with a slotted spoon to a paper towel-lined plate, reserving 1 tablespoon of drippings in the pan. Toss in 3 cups mustard greens and 2 cloves garlic; cook until wilted and tender, about 3 minutes. Stir in 1 tsp apple cider vinegar to cut the fat, pull from heat, and let cool slightly.
12 min
Tip: Mustard greens have a spicy punch that mellows into earthy, rich goodness alongside bacon drippings.
- 6
In a medium bowl, whisk together 6 large eggs, 0.75 cup heavy cream, 0.5 cup whole buttermilk, 0.125 tsp ground nutmeg, 0.5 tsp hot sauce, remaining 1 tsp kosher salt, and remaining 0.5 tsp black pepper until completely homogenous and aerated. Gently fold in the wilted mustard greens, cooked bacon, and 1 cup extra-sharp white cheddar cheese.
5 min
Tip: Buttermilk adds that quintessential Southern tang and balances the rich cream and sweet potato sweetness.
- 7
Carefully pull the par-baked crust from the oven and lower the temperature to 350°F (175°C). Pour the egg custard mixture into the hot sweet potato crust. Scatter the remaining 0.5 cup extra-sharp white cheddar cheese evenly across the surface. Return to the oven and bake until the center is just set with a faint, proud tremble when shaken gently, about 28 to 30 minutes.
30 min
Tip: Do not overbake! Residual cast-iron heat will carry the custard through to silky perfection as it sits.
- 8
Remove the skillet from the oven and set it on a wire rack. Let the quiche rest undisturbed so the custard sets up into clean, velvety slices. Garnish the top with 2 scallions, slice into wedges, and serve warm right from the iron.
10 min
Tip: Resting is crucial for quiche; cutting into it piping hot will cause the custard to weep.
Chef's Notes
Down home in Atlanta, my grandmother always believed you shouldn't let sweet potato season slip by without putting them in everything—from skillet biscuits to morning casseroles. Traditional pastry crusts are fine, but grating sweet potatoes right into hot cast iron with butter creates a lacy, caramelized nest that cradles this savory custard better than any shortcrust ever could. The bite of peppery mustard greens and buttermilk cuts right through the richness of the bacon and sharp cheddar.
Marcus Stone
Heritage recipes with a chef's touch
My grandmother's kitchen in Atlanta is where I learned that food carries history. Every pot of collards, every batch of biscuits, every Sunday roast told stories of resilience, family, and love. I went on to train at the finest restaurants in Charleston and worked my way up through white-tablecloth kitchens. But I always came back to those family recipes—now I cook them with a chef's technique but a grandmother's heart. Because the best food honors where it came from.