Step 1

Preheat the oven to 375ºF. Grease or line 14-16 muffin cups with paper liners.

Step 2

In a large bowl, stir the brown sugar and the butter together.  Add the milk, egg and vanilla as stir to combine.  Add the flour, baking soda and salt and mix just until incorporated.  If using, stir in the nuts.

Step 3

Divide the mixture between the prepared muffin cups, about 2/3 full each.

Step 4

Bake in the preheated oven until a tested inserted in the center comes out clean, 15-20 minutes.