This 4-ingredient buttermilk pie is the kind of practical magic my Midwestern great-grandmother would have leaned on when the weather turned warm and the pantry was thin. It’s a true Depression-era dessert: just buttermilk, sugar, eggs, and a simple pie crust, baked into a soft-centered, gently browned custard.
The filling is whisked in minutes, the crust can be store-bought or homemade, and the result is a cool, creamy slice that somehow disappears from the kitchen the same day it’s made. If you like desserts that are unfussy, economical, and nostalgic, this is one to keep in your back pocket.
Freshly baked buttermilk pie on a kitchen counter
Freshly baked buttermilk pie on a kitchen counter
Serve this buttermilk pie well-chilled or at cool room temperature so the custard can fully set and slice cleanly. I like it plain, but a handful of fresh berries or sliced stone fruit on the side plays nicely with the tang of the buttermilk.
A cup of hot coffee or black tea balances the sweetness, while iced coffee or cold brew makes it feel especially summery. If you want to dress it up for company, add a light dusting of powdered sugar right before serving, or a small dollop of unsweetened whipped cream to keep the focus on the pie’s silky texture.
4-Ingredient Buttermilk Pie
Servings: 8
Ingredients
1 unbaked 9-inch pie crust (homemade or store-bought, fitted into a ceramic pie plate)
1 1/2 cups granulated sugar
3 large eggs, at room temperature
1 1/2 cups buttermilk, well-shaken
Directions
Preheat your oven to 375°F (190°C). Place the ceramic pie plate with the unbaked pie crust on a baking sheet to catch any drips and make it easier to move in and out of the oven.
Unbaked pie crust in ceramic plate on baking sheet
Unbaked pie crust in ceramic plate on baking sheet
In a medium mixing bowl, whisk the granulated sugar and eggs together until the mixture looks thickened, pale, and slightly ribbony, about 1 to 2 minutes by hand. You want the sugar to start dissolving into the eggs so the custard bakes up smooth.
Slowly pour in the buttermilk while whisking constantly, until the mixture is completely smooth and uniform. It will be fairly thin; that’s exactly what you want for a soft, custardy center.
Buttermilk custard mixture being whisked in a bowl
Buttermilk custard mixture being whisked in a bowl
Give the pie crust a quick check to be sure it’s evenly pressed into the ceramic plate with no cracks. If you see any thin spots or holes, patch them with a bit of extra dough to prevent leaking.
Carefully pour the buttermilk mixture into the unbaked pie crust. If your crust edge is very high, leave a little space at the top so the filling doesn’t overflow as it puffs in the oven.
Transfer the baking sheet with the filled pie to the center rack of the preheated oven. Bake for 15 minutes at 375°F (190°C) to help set the crust and start the custard.
Filled pie being placed into the oven
Filled pie being placed into the oven
Without removing the pie, reduce the oven temperature to 325°F (165°C). Continue baking for 30 to 40 minutes more, or until the top is lightly browned, the edges are set, and the center still has a gentle wobble when you nudge the plate. The pie will continue to firm up as it cools.
If the crust or top browns too quickly while the center is still quite loose, tent the pie loosely with a piece of foil to prevent overbrowning while it finishes baking.
Remove the pie from the oven and place the ceramic pie plate on a wire rack. Let the pie cool at room temperature until it reaches just slightly warm, about 1 to 2 hours. This gradual cooling helps the custard set without cracking.
Buttermilk pie cooling on a wire rack
Buttermilk pie cooling on a wire rack
Once mostly cooled, transfer the pie (still in the ceramic plate) to the refrigerator and chill for at least 2 hours, or until fully cold and set. For the cleanest slices, chill 4 hours or overnight.
To serve, slice the pie with a sharp knife, wiping the blade between cuts for neat wedges. The top should be lightly golden and the center soft and custardy, with a tender crust underneath.
Variations & Tips
Because this recipe is so minimal, small tweaks can make it feel new without losing its Depression-era spirit. For a slightly richer texture, you can use 4 eggs instead of 3; the custard will be a bit firmer and slice even more cleanly.
If you like a hint of complexity but want to respect the 4-ingredient idea, use a touch of brown sugar in place of a few tablespoons of the granulated sugar to add a gentle caramel note. You can also swap in a partially baked crust if you prefer a crisper bottom: dock the crust with a fork, blind-bake at 375°F (190°C) for 10 minutes, cool briefly, then fill and bake as directed, watching closely so it doesn’t overbrown.
Slice of buttermilk pie served with berries
Slice of buttermilk pie served with berries
To make smaller portions, divide the filling between two 8-inch pie plates and start checking for doneness a bit earlier. For food safety, always use fresh, pasteurized eggs and keep the pie refrigerated once cooled; custard pies should not sit at room temperature for more than 2 hours.
Make sure the center of the pie is gently set (not liquid) before serving to ensure the eggs are fully cooked. Cool the pie on a rack before chilling so condensation doesn’t drip onto the surface, which can affect both texture and appearance.

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