Preheat oven to 400°F (200°C).

In a mixing bowl, combine flour, sugar, baking powder, and salt.

Make a well in the center of the dry ingredients.

In a separate bowl, combine egg, milk, and cooking oil.

Add the wet ingredients to the well in the dry ingredients.

Stir until just moistened; batter should be lumpy.

Lightly grease muffin cups or line with paper bake cups.

Fill muffin cups 2/3 full.

Bake for about 20 minutes, or until golden brown.

Remove from pans and serve warm.