How to make
Dissolve the yeast and sugar in the slightly warmed water. Let it activate for 7-8 minutes.
Sift the flour into a bowl, along with the salt. Make a well in which you pour the yogurt and activated yeast.
Knead a soft dough, adding as much flour as needed until smooth and no longer sticky. Grease your fingers with the oil to make it easier.
Leave the dough in the bowl and cover it with a towel. Wait for it to double in volume - about 1 hour.
Roll it out into a thick crust, a little less than a centimeter. With a sharp knife, cut out rhombus shaped buhti.
Grease the bottom of a baking pan generously and arrange the buhti in it at a distance. Spread each of them with a generous amount of the oil and let them rise in a warm place for about 30-40 minutes.
Heat the oven to 360°F (180°C) and bake the fluffy buhti until they acquire a golden color - about 30 minutes. You can finally increase the oven to 390°F (200°C), for faster browning, but don't overcook them so they don't dry out (bake in 2-3 batches, depending on the size of your baking pan).
While hot, spread with butter and wrap them in a towel to soften. As soon as they are almost cold, sprinkle generously with powdered sugar and serve. Incredibly delicious oven-baked buhti with yogurt.