1. In a large mixing bowl, combine the flour and salt. It’s important to mix these dry ingredients well before incorporating any wet ingredients. This ensures an even distribution of flavors.
2. Now, rub the cold butter into the flour until the mixture resembles coarse crumbs. This step is crucial because the butter needs to be evenly incorporated, which will help create that desirable texture in the buns.
3. Set the dry mixture aside and grab a measuring cup. Measure out the lukewarm water, then add the sugar and yeast to it. Stir this mixture gently and allow it to sit for about 2 to 3 minutes. You should notice it becoming cloudy and possibly foaming, indicating that the yeast is activating.
4. Once the yeast is foamy, add in the egg and mix it well. This will be the wet mixture that brings everything together.
5. Pour the activated yeast mixture into the flour mixture. Begin kneading the dough, either by hand or using a mixer. If kneading by hand, aim for about 4 to 6 minutes. The dough should be smooth and slightly sticky to the touch, but it should not stick to your hands or the surface excessively.
6. After kneading, place the dough in an oiled bowl and cover it with plastic wrap. Let it rise in a warm, dry place (like inside your oven while it’s turned off) for about 1 to 2 hours. Check back to see if it has doubled in size, which is a sign it’s ready for the next step.
7. Once the dough has risen, remove it from the oven and preheat it to 350 degrees Fahrenheit. This ensures that your buns will bake perfectly.
8. Shape your dough into the desired size and thickness of buns. Once shaped, cover them with plastic wrap again and let them rest for another 30 minutes while the oven is preheating. This additional rise will make them even fluffier!
9. Before placing the buns in the oven, brush the tops with the beaten egg wash and sprinkle with sesame or poppy seeds if you’re using them. This will give your buns a beautiful, golden finish.
10. Finally, bake the buns on a middle rack for 15 to 20 minutes, depending on their size, until they’re nice and golden. Once they’re baked, let them cool slightly before serving.