Old Fashioned Buttermilk Pie with Flaky Crust

Old Fashioned Buttermilk Pie

The smell of toasted butter and tangy buttermilk filling the house is the first sign this pie is almost ready. It's that specific, sweet tart scent that reminds me of every Atlanta kitchen I grew up around. You get a rich, custard-like center that doesn't feel like a sugary pudding.

This Old Fashioned Buttermilk Pie is a quick win because the prep is minimal but the payoff is huge. You don't need any fancy techniques, just a few basic pantry staples and some patience while it cools.

Expect a dessert that's a bit more sophisticated than a standard cake. It's creamy, slightly tart, and has a golden brown top that looks beautiful on a platter.

Why the Custard Sets

• Cold Butter: Keeping the butter cold in the crust creates tiny steam pockets. This makes the dough flaky rather than tough.
• Cornstarch Ratio: The mix of flour and cornstarch stabilizes the eggs. It helps the filling hold together and reduces weeping after slicing.

Depending on how much time you have, you can go the traditional route or save a few minutes with a store-bought base.

Ingredient Deep Dive

The balance here is all about the acidity of the buttermilk cutting through the fat of the butter.

The choice of full-fat buttermilk is a Grandma Lucille staple. It helps the filling stay rich and reduces separation during the bake.

For the Crust

• 1¼ cups all-purpose flour
• ½ tsp salt
• ½ cup cold unsalted butter, cubed Why this? Cold fat creates the flaky layers.
• 4 tbsp ice water

For the Tangy Filling

• 1½ cups granulated sugar
• 3 tbsp all-purpose flour
• 2 tbsp cornstarch
• ¼ tsp salt
• 3 large eggs
• 1 cup full-fat buttermilk Why this? Essential for the signature Southern tang.
• ½ cup unsalted butter, melted and cooled
• 1 tsp pure vanilla extract

Necessary Tools

You'll need a 9 inch pie dish and a large whisking bowl. A pastry cutter is great for the crust, but a sturdy fork works just as well if you're in a pinch. I recommend a wire cooling rack to keep air flowing under the crust so it doesn't get soggy.

Step by step Guide

Phase 1: Preparing the Crust

1. In a bowl, combine 1¼ cups all-purpose flour and ½ tsp salt. Using a fork or pastry cutter, cut in ½ cup cold cubed unsalted butter until the mixture looks like coarse crumbs.
2. Mix in 4 tbsp ice water gradually, adding small amounts until the dough just begins to hold together.
3. On a floured surface, roll the dough into a 12 inch circle and transfer it to a 9 inch pie dish. Crimp and trim the edges.
4. Heat the oven to 350°F (180°C). Prick the crust bottom lightly with a fork to prevent it from bubbling.

Phase 2: Mixing the Filling

5. Whisk 1½ cups granulated sugar, 3 tbsp all-purpose flour, 2 tbsp cornstarch, and ¼ tsp salt in a large bowl until no lumps remain.
6. Gently whisk in 3 large eggs, one at a time. Note: Avoid over-beating to keep the top from cracking.
7. Slowly stir in 1 cup full-fat buttermilk and 1 tsp pure vanilla extract until smooth.
8. Add ½ cup melted and cooled unsalted butter, stirring until fully incorporated.

Phase 3: Baking and Setting

9. Pour the filling into the prepared crust.
10. Place the pie dish on a baking sheet and bake for 40-45 minutes until the edges are set and slightly puffed, but the center still has a slight, jello-like wobble when gently shaken. A rich, caramelized sugar aroma should be present.
11. Take the pie out of the oven and let it cool completely on a wire rack for at least 2 hours to allow the custard to finish setting.

Chef's Note: To achieve a perfectly smooth top, I suggest pouring the filling through a fine mesh strainer to remove any egg bits before adding it to the crust.

Solving Pie Problems

Don't worry if your pie isn't a textbook example of perfection. Most custard mishaps are caused by temperature or too much air. A crack on the surface typically means the oven ran a bit hot, but the taste remains excellent.

If the middle feels too soft, you may have removed it from the oven a few minutes too early. Since a slow set is key for this filling, a slight wobble is much better than a rubbery texture.

It's also a good idea to verify your oven's temperature with an external thermometer. Most ovens are off by 10-20 degrees, which can easily ruin a delicate custard.

Dietary Swaps

To make this recipe gluten-free, substitute a 1:1 flour blend for both the filling and the crust. Keep in mind that the resulting crust will be more delicate and may shrink more while baking.

For a different taste, stirring a pinch of ground nutmeg into the sugar provides a warm, earthy quality. I also suggest adding a teaspoon of lemon zest to the buttermilk for an added touch of brightness.

Keeping it Fresh

Store this Old Fashioned Buttermilk Pie in the refrigerator. Use an airtight container or cover it loosely with plastic wrap to keep it fresh for 3 to 5 days.

I wouldn't recommend freezing this pie. Although it can be wrapped in foil and stored for 2 months, the custard typically becomes grainy upon thawing. If you do freeze it, let it thaw slowly in the fridge for 24 hours before serving.

This pie is best served chilled. If you'd prefer it warm, heat a slice for 5-8 minutes at 300°F (150°C).

Serving Suggestions

For the best experience, serve this with a dollop of unsweetened whipped cream. Its airy lightness balances the dense, velvety texture of the custard. In Georgia, some prefer adding a few fresh blackberries on the side to highlight the tart notes.

As the pie is quite rich, a bold cup of black coffee is the perfect pairing to refresh your palate between bites.