In a small bowl, combine powdered sugar with a splash of water or dairy-free milk, stirring until thick and drippy. Set aside for later.

Lightly grease an 11-12 oz mug with your chosen oil.

In a medium bowl, whisk together the flour, baking powder, and salt.

Gradually add water to the dry ingredients, mixing until a slightly tacky dough forms.

Roll the dough into a long strip, sprinkle with cinnamon and sugar, then roll tightly.

Place the rolled dough into the greased mug, pour ½ teaspoon of water over it, and microwave on high for about 50 seconds.

Once done, remove the mug, spoon icing over the roll and serve warm.