Laskiaistiistai is the same as Fat Tuesday or Shrove Tuesday. In Finland laskiainen is nowadays celebrated as a mid-winter festival with outdoor activities such as skiing, sliding with the sled, or ice-skating.
Add in the rest of your flour and start kneading. Once you have some elasticity in the dough, you can add your butter.
Keep on kneading for additional 7-15 minutes. Knead until the dough is firm enough so it does not break when you stretch a small piece between your fingers
After kneading, you need to let your dough rest and rise. Cover your bowl with a cloth and let the dough rest in a warm place for 20 minutes.
Form the dough into 15-16 round buns by kneading them against the surface in your palm.
Let your buns rise to double the sizeBrush the buns with beaten egg.Bake at 400 (200C) F for about 14 minutes