Preheat oven to 350 degrees F
Line a baking sheet with parchment paper or silicone mat
In a large bowl, cream together the butter and sugar until fluffy
Mix in the egg and vanilla and milk until well combined
Add flour, baking soda, and salt, and mix until well combined
Divide dough using a cookie dough scoop and roll into balls
Place on baking sheet
For sprinkles, roll ball in sprinkles then place on baking sheet
Bake for 10-12 minutes or until lightly golden - Do not over bake
Remove from oven and immediately add chocolate kiss pressing down gently
Let cool and remove to wire rack
Store in an airtight container