Preheat oven to 400 degrees
In a bowl whisk together 1 cup of milk, 1 egg and 1 tbsp of oil.
In a separate bowl, empty the contents of your Mason Jar and mix thoroughly, breaking up any lumps
Add the wet ingredients to the dry, and blend until fully combined.
Fill muffin cups 2/3 full.
For large muffins bake 12-15 min, for small muffins cook 8-10 min, or a toothpick comes out clean.
Let cool for 5 minutes (if you can) and then enjoy!