1/2 cup + 2 Tbsp butter, softened (Salted. In case you are using unsalted butter, add 1/2 tsp salt)
1 Tbsp sugar + 1/2 cup powdered sugar
Procedure:
In a bowl add flour, 1 Tbsp sugar, 1 tsp cinnamon powder, 1/2 cup butter and baking powder. Mix it together. Add milk to form a smooth dough. Keep aside.
In another bowl add 2 Tbsp butter, 1/2 cup powdered sugar and 2 Tbsp cinnamon powder. Mix it together till its a fine mixtures.
On a clean slab roll the dough in a rectangle. Spread the mixture evenly on the dough. Cut strips of 1 cm in width and roll it delicately. Would look like this. (See picture)
On a greased tray place all these cinnamon rolls.
Bake for 20 minutes at 180 deg C. Serve warm.
Note:
If you want to glaze them, you can mix 2 Tbsp icing sugar with 1 Tbsp milk and brush it on the cinnamon rolls.