Preheat oven to 350 degrees C.
Beat butter to soft cream, add sugar and mix until light and creamy.
Add the egg 1 at a time and mix.
Whisk together baking soda and flour.
Slowly add in the flour mix, 1/3 at a time.
Add in the sour cream and mix. Then add in the milk. Start with 1/3 cup, and if it is still a bit thick, add 3 tbsps of milk.
Add in the spices.
Fill the cupcake tins 3/4 of the way and bake for 18-22 minutes. (Mine were done after 20 minutes, but it depends on your oven) Check if done using a toothpick. If the toothpick comes out clean the cupcakes are done.
Place cupcakes on a cooling rack.