Preheat your oven to 400°F (200°C). Grease a muffin tin or line with paper liners.
In a large bowl, whisk together the flour, baking powder, and salt.
In another bowl, mix the milk, vegetable oil, and egg until well combined.
Pour the wet ingredients into the dry ingredients and stir until just combined. Do not overmix.
Fold in the shredded cheddar cheese and crumbled bacon.
Divide the batter evenly among the muffin cups.
Bake for 18-20 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
Let the muffins cool in the tin for a few minutes, then transfer to a wire rack to cool completely.