Begin with basic pulla dough after its second rise.
If using the entire pulla recipe, break into three parts: the rest of the recipe describes making one dozen buns or one third of the total pulla dough recipe. Repeat for the other two parts of dough if desired
Lightly grease a baking sheet (recommend one sheet per dozen buns)
Preheat oven to 400 degrees Farenheit
Divide the dough into twelve equal parts
Form each piece of dough into a ball shape, they will be a little bigger than golf ball size
Place on baking sheet and let rise until puffy, about 20 minutes or so
Brush each bun with beaten egg
Divide 4 Tbsp butter into 12 equal squares and press one into the center of each bun.
Pour 1 tsp granulated sugar on top of each cube of butter
If desired, sprinkle pearl sugar around the edges of granulated sugar
Place baking sheet in the oven and bake for 12-17 minutes, until golden brown and fragrant
Enjoy!
Notes
I use a kitchen scale when dividing the dough to get them as close to equal size as possible. This ensures even baking. Divide first into three equal pieces, than each of those into four equal pieces.