Preheat oven to 400F. Grease 12 muffin cups.
Mix together flour, baking powder, sugar, and salt.
In a separate bowl mix egg, milk, and oil until combined.
Add wet ingredients all at once to the dry ingredients along with bacon until just combined. The mixture will look somewhat lumpy but do not mix more.
Fill the muffin cups 2/3 of the way full.
Bake for 25 minutes.