Preheat oven to 375 degrees. Line a 12 count muffin tin with cupcake liners.
In a bowl, combine the mashed banana with an egg, canola oil, and vanilla extract. Mix until well combined.
Add in the flour, sugar, baking soda, and salt. Mix in just until everything is moist and combined.
Divide batter between the 12 lined muffin cups. Bake at 375 degrees for 18-22 minutes, until toothpick inserted in the center comes out clean. Makes 12 servings.