Cream together butter, brown sugar, and white sugar together using a mixer. The mixture should be light and fluffy.
Add in milk and vanilla extract to the butter mixture. Mix together.
Heat flour in the microwave until it reaches a temperature of 180 degrees. Heat in thirty second increments.
Add warm flour to the butter mixture and mix together.
After the flour is mostly combined, add in salt and sprinkles.
Serve in a bowl, by itself, or add some extra sprinkles and call it a party!