28 ounces/800 grams AP flour (5 1/2 cups if your scale is broken but no guarantees!)
20 ounces/570 grams buttermilk, room temp or microwaved for 40 to 60 seconds to take the chill off it
1/4 ounce/7 grams (1 package) active dry yeast
1/2 ounce/14 grams kosher salt (1 tablespoon)
1.5 ounces/40 grams honey (2 tablespoons)
vegetable spray or butter for greasing a springform pan (can use 9-inch cake pan but may be hard to remove rolls)
1 teaspoon poppy seeds (or as desired)
1 tablespoon melted butter, optional (good for photos!)
Combine the flour, buttermilk, yeast, salt and honey in the bowl of a standing mixer. Mix on medium till the dough is smooth and elastic, about 10 minutes. (See this post on Bread Baking Basics for more info on mixing and rising.)
Cover and let rise till doubled in volume (dough shouldn’t bounce back when you press a finger into it). This will take at least two hours, maybe three or more depending on the temperature of your dough and the temperature of your kitchen.
Turn the dough out onto your counter and give it a good knead. Divide the dough into 12 equal portions (about 4 ounces each). Form each into a tight boule by rolling it on the counter. Spray or butter a springform pan. Fit the boules into it, cover it with a towel and let the dough rise for an hour.
Preheat your oven to 375 degrees F./190 degres C. Whisk the egg till it’s uniformly yellow.
When the rolls have risen again, brush them with the egg wash, sprinkle them with poppy seeds and bake them for 40 minutes (to an internal temperature of 195-200 degrees F./90-93 degrees C. Let them rest for about 10 minutes before serving.
Serves 12 adults or 4 hungry children. Serve with soft, soft butter. Mmmmm.