In a bowl, take lukewarm water. Mix sugar and yeast into it and keep aside until yeast froths.
In a mixing bowl, take Whole wheat flour, Oil, Salt and Yeast solution. Start kneading the dough by adding water into it.
Initially the dough will be sticky. Take out the dough on lightly floured surface and knead it for 10 minutes. You will get much smoother and non-sticky dough.
Keep this dough into a greased pan and cover it with cling wrap. Let the dough rest until it doubles in volume.
Once the dough has doubled in its volume, take is out on a dusted surface and punch it to release the air.
Divide the dough into 6 equal parts.
Shape each dough ball into a bun and keep all these dough balls on a greased baking tray by leaving some space in between.
Brush these dough balls with milk and cover with a greased cling wrap. Keep these aside for 30 min or until it doubles in volume.
Meanwhile, preheat the oven to 200 degrees for 10 min. Now bake these buns at the same temperature for 30 min. Once baked, take these out of the oven and brush with oil/ Butter.
Your fresh, healthy, whole wheat burger buns are ready. Cheers!!