Old-Fashioned Buttermilk Bar Donuts

updated Jun 17, 2020
Buttermilk Bar Donuts

These rectangular-shaped donuts, which are similar in taste to a classic old-fashioned donut, are a Los Angeles favorite. Here's how to make them at home.

Makesabout 30 bars

Prep30 minutes

Cook45 minutes

Jump to Recipe
We independently select these products—if you buy from one of our links, we may earn a commission. All prices were accurate at the time of publishing.
donuts cooling on a baking sheet and rack
Credit: Photo: Joe Lingeman; Food Styling: Jesse Szewczyk

I am an equal opportunity donut lover. I love them all, from the mass-produced to the artisanal. But if I had to pick a favorite, it would be the old-fashioned buttermilk bar, which boasts craggy edges and a glazed top that I can’t get enough of.

Buttermilk bars rose to popularity in Los Angeles-based mom-and-pop donut shops in the 1960s. They are still the top seller at many LA donut shops today, including Primo’s. Because I have yet to try one in LA, I did what I do best: I developed a recipe at home. The ones I’m sharing here are crispy on the outside and fluffy on the inside, and make for a fabulous weekend baking project, if I do say so myself.

Credit: Photo: Joe Lingeman; Food Styling: Jesse Szewczyk

3 Tips for Making Buttermilk Bars at Home

Buttermilk bars, as their name implies, are shaped into rectangles rather than circles — but otherwise, they’re pretty similar to classic old-fashioned donuts made with buttermilk. Here are some helpful tips for making them at home.

  1. Use whatever type of sugar you have on hand. I like to make the dough with equal parts granulated and brown sugars, but you can use either all granulated sugar or all light brown sugar with equally successful results.
  2. Be generous with the flour. Although the donut dough is very sticky, it can take some tough love, so don’t be afraid to generously flour your hands and the work surface to prevent it from sticking.
  3. Use a fish spatula or a spider to transfer donuts to the oil. I find a fish spatula is the easiest tool for transferring the donuts to the oil and retrieving them, but many others prefer to use a spider. Use whatever frying utensil you are most comfortable working with.

Perhaps most importantly, don’t be too precious! These donuts are meant to be rustic, and no matter what shape they enter the oil in, they’re guaranteed to be delicious all the same.

Buttermilk Bar Donuts

These rectangular-shaped donuts, which are similar in taste to a classic old-fashioned donut, are a Los Angeles favorite. Here's how to make them at home.

Prep time 30 minutes

Cook time 45 minutes

Makes about 30 bars

Nutritional Info


For the donuts:

  • 4 tablespoons

    (1/4 cup) unsalted butter

  • 3 1/2 cups

    cake flour, plus more for dusting

  • 2 3/4 teaspoons

    baking powder

  • 1/4 teaspoon

    baking soda

  • 1 1/2 teaspoons

    kosher salt

  • 3/4 teaspoon

    ground nutmeg

  • 1/2 cup

    packed light brown sugar

  • 1/2 cup

    granulated sugar

  • 1 tablespoon

    vanilla extract

  • 1

    large egg

  • 3

    large egg yolks

  • 3/4 cup


  • About 2 quarts vegetable oil, for deep frying

For the vanilla glaze:

  • 2 cups

    powdered sugar, sifted if lumpy

  • 1 tablespoon

    vanilla extract

  • 1/4 cup

    boiling water


  1. Make the donuts: Place 4 tablespoons unsalted butter in a small microwave-safe bowl. Microwave on HIGH until melted. Set aside to cool slightly.

  2. Place 3 1/2 cups cake flour, 2 3/4 teaspoons baking powder, 1/4 teaspoon baking soda, 1 1/2 teaspoons kosher salt and 3/4 teaspoon ground nutmeg in a medium bowl and whisk to combine.

  3. Place the melted butter, 1/2 cup packed light brown sugar, 1/2 cup granulated sugar, and 1 tablespoon vanilla extract in the bowl of a stand mixer fitted with the paddle attachment. (Alternatively, use a large bowl and electric handheld mixer.) Beat on medium speed until fluffy, scraping the bowl with a rubber spatula as needed, about 2 minutes.

  4. Reduce the speed to low. Add 1 large egg and 3 large egg yolks one at a time, stopping and scraping down the bowl as needed. Add 3/4 cup buttermilk and mix until combined.

  5. Add the dry ingredients all at once and mix just until a few streaks of flour remain. Remove the bowl and continue mixing by hand until there are no dry bits of flour. The dough will be quite sticky. Refrigerate at least 1 hour and up to overnight. The rest in the fridge makes the dough easier to work with: it remains sticky, but firms up considerably.

  6. Line two rimmed baking sheets with parchment paper. Heavily flour a work surface and your hands with cake flour. Transfer half of the dough to the work surface, and sprinkle it with flour. Pat the dough into a 3x24-inch rectangle with the long side facing you, adding more flour to the work surface as needed. The dough is extremely soft and sticky, so don’t be afraid to use as much flour as you need.

  7. Use a floured bench scraper or butter knife to cut the rectangle into 1 1/2-inch wide bars, flouring underneath the bars, the work surface, and the bench scraper as you work. Once all the bars are cut, dip the bench scraper in flour and very gently press it down the center of each bar, making a slight indentation (this will give your donut the quintessential buttermilk bar look).

  8. Using a brush, lightly brush the excess flour off the bars. Use a floured bench scraper or thin metal spatula to gently transfer each bar to one of the prepared sheets, flipping it over so that it is indentation-side down. Brush the excess flour from the other side of the bars. Refrigerate and repeat with shaping and cutting the remaining dough.

  9. Fill a large, heavy pot or Dutch oven with at least 2 inches of vegetable oil. Heat the oil on medium-high heat until 350ºF, or a bit above (the temperature will drop when you add your donuts). Meanwhile, fit a wire rack over a baking sheet.

  10. Remove the first tray of bars from the refrigerator. Frying in batches of 4 to 5 so as not to crowd the pot, use a thin metal spatula to carefully transfer the donuts into the hot oil. Fry until dark golden brown, about 1 minute per side. Carefully transfer the donuts to the rack with the spatula. Repeat frying the remaining donuts. Let cool to room temperature before glazing.

  11. Make the glaze: Place 2 cups powdered sugar in a large bowl. Add 1 tablespoon vanilla extract and 1/4 cup boiling water and whisk until shiny and smooth. Dip a donut indentation-side down halfway into the glaze. Lift it up and allow the excess glaze to drip off. Return to the rack glazed-side up and repeat with the remaining donuts.

Recipe Notes

Make ahead: The donut dough can be made and refrigerated up to 24 hours before frying.