These potato bread buns are a baker’s secret for the softest, most tender rolls you’ll ever make. The mashed potato adds moisture and a subtle sweetness, while also helping the buns stay fresh for days. This recipe produces beautifully golden, pillowy buns that are perfect for sandwiches, burgers, or simply slathered with butter.
Ingredients
- 1 cup (240 ml) whole milk, warmed to 110°F (43°C)
- 2 1/4 teaspoons (7 g) active dry yeast (one packet)
- 1 tablespoon (12 g) granulated sugar
- 1 cup (240 g) mashed potatoes, cooled to room temperature (from about 1 large potato)
- 1/4 cup (57 g) unsalted butter, melted and cooled slightly
- 1 large egg, room temperature
- 1 teaspoon (6 g) salt
- 3 1/2 cups (420 g) all-purpose flour, plus more for dusting
- 1 egg beaten with 1 tablespoon water, for egg wash
- Optional: flaky sea salt or sesame seeds for topping
Instructions
- Proof the yeast: In a small bowl, combine the warm milk, sugar, and yeast. Let sit for 5-10 minutes until frothy. If it doesn’t foam, your yeast may be dead—start over with fresh yeast.
- Mix the dough: In a large bowl or the bowl of a stand mixer, combine the mashed potatoes, melted butter, egg, and salt. Add the yeast mixture and stir to combine. Gradually add the flour, 1 cup at a time, until a soft dough forms.
- Knead: Turn the dough onto a lightly floured surface and knead for 8-10 minutes (or use a stand mixer with a dough hook on medium-low speed for 6-8 minutes) until the dough is smooth and elastic. It should be slightly tacky but not sticky. Add a little more flour if needed, but avoid over-flouring.
- First rise: Place the dough in a lightly oiled bowl, turning to coat. Cover with plastic wrap or a clean kitchen towel and let rise in a warm, draft-free place for 1 to 1 1/2 hours, or until doubled in size.
- Shape the buns: Punch down the dough and turn it out onto a lightly floured surface. Divide into 12 equal pieces (about 75 g each). Shape each piece into a smooth ball by pulling the edges into the center and pinching the bottom. Place the buns on a parchment-lined baking sheet, about 2 inches apart.
- Second rise: Cover the buns loosely with a towel and let rise for 30-45 minutes, until puffy and almost doubled.
- Preheat and egg wash: Preheat your oven to 375°F (190°C). Gently brush the tops of the buns with the egg wash. Sprinkle with flaky salt or sesame seeds if desired.
- Bake: Bake for 18-20 minutes, until the tops are golden brown and the buns sound hollow when tapped on the bottom. An instant-read thermometer inserted into the center of a bun should read at least 190°F (88°C) for fully baked bread.
- Cool: Transfer the buns to a wire rack to cool completely. They are delicious warm, but let them cool at least 15 minutes for easier slicing.
Tips
- Use dry, fluffy mashed potatoes: For the best texture, use mashed potatoes that are on the drier side. If your mashed potatoes are very wet, reduce the milk by 2 tablespoons or add an extra 1/4 cup (30 g) of flour.
- Don’t over-knead: Over-kneading can make the buns tough. Stop kneading as soon as the dough is smooth and springs back when poked.
- Room temperature ingredients: Cold eggs or butter can slow down the rise. Let them sit at room temperature for 30 minutes before starting.
- Substitution: You can use instant mashed potato flakes (about 2/3 cup dry, rehydrated) in a pinch, but the texture will be slightly less rich.
Serving Suggestions
These buns are incredibly versatile. Serve them as hamburger buns, slider buns, or alongside soups and stews. They also make excellent sandwich rolls for pulled pork, roasted vegetables, or turkey and cranberry. For breakfast, split and toast them, then spread with jam or honey butter.
Variations
- Herb and Garlic: Add 2 cloves of minced garlic and 1 tablespoon of chopped fresh rosemary or thyme to the dough during the mixing step.
- Cheese: Fold in 1 cup (120 g) of shredded cheddar or parmesan cheese after the dough comes together.
- Whole Wheat: Replace half of the all-purpose flour with whole wheat flour. You may need to add an extra 2-3 tablespoons of milk.
- Sweet Potato: Swap the mashed potato with mashed sweet potato for a slightly sweeter, more colorful bun.
Storage and Reheating
Store the buns in an airtight container or zip-top bag at room temperature for up to 3 days. They also freeze beautifully for up to 3 months—wrap them individually in plastic wrap and then place in a freezer bag. To reheat, thaw at room temperature, then warm in a 300°F (150°C) oven for 5-10 minutes, or in a toaster oven until warm and crusty.
Frequently Asked Questions
Why didn’t my buns rise? The most common reason is that the yeast was expired or the milk was too hot (above 120°F/49°C), which kills the yeast. Always check the expiration date and use a thermometer to ensure the milk is between 105°F and 115°F (40°C-46°C).
Can I use instant yeast instead of active dry? Yes, you can substitute instant yeast (also called rapid-rise or bread machine yeast) 1:1. You can mix it directly into the flour without proofing, and the rise time may be slightly shorter.
Can I make the dough ahead of time? Yes, you can refrigerate the dough after the first rise. Punch it down, cover the bowl tightly, and refrigerate for up to 24 hours. When ready to bake, let the dough come to room temperature, then proceed with shaping and the second rise.
Why are my buns dense and heavy? This usually happens when too much flour is added during kneading or shaping. The dough should be soft and slightly tacky. Also, make sure your mashed potatoes are light and fluffy, not packed down.
Can I make these gluten-free? This recipe is not easily adapted to gluten-free flour. For a gluten-free version, you would need a specific gluten-free bread flour blend and likely a binder like xanthan gum, and the texture will be different.
How do I know when the buns are done? The tops should be deep golden brown, and the internal temperature should be at least 190°F (88°C). Tapping the bottom should produce a hollow sound.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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