Preheat your oven to 375F. Line 12 muffin tins with paper liners or spray them with nonstick baking spray.
Cream together the melted butter and brown sugar until they are combined.
Add the vegetable oil, eggs, and vanilla bean paste. Mix at low speed until the ingredients are fully combined.
In a separate small bowl, combine the flour, baking, powder, and cinnamon.
With the mixer on low, add 1/3 of the dry ingredients. Next, add 1/2 of the milk. Now add another 1/3 of the dry ingredients.
Add the remaining milk followed by the remaining flour.
Divide the batter evenly between the muffin pans
Bake the muffins in a preheated oven for 15-18 minutes