Sift the Dry Ingredients
Sift flour, baking soda, salt. Whisk to combine and set aside.
Make the Dough
Cream the butter, granulated sugar, brown sugar and peanut butter together.
Cream it by hand for old school cool, or you could use a mixer.
Add the egg, milk and vanilla. Mix until combined.
Gradually add the dry ingredients. Mix until just combined.
Dough may be soft and sticky, so refrigerate about an hour.
Preheat to Oven
Set the oven rack to the middle position.
Preheat oven to 375 degrees F (360 when using convection oven).
Shape the cookies
Roll the dough into 1 inch balls.
(After baking the first batch, adjust the ball size as desired).
Option: For a festive look, add red and/or green sprinkles to the sugar when rolling.
Put the sugar/sprinkles mix on a plate.
Roll the balls in sugar, then place on cookie sheet, 2 inches apart.
Bake
Bake until very light and puffy, maybe 8 minutes.
While baking, unwrap enough kisses for the cookies on the sheet.
Remove the cookies and lightly and slowly press a kiss down into the cookie.
Cookies will crack when pressing in the kisses, but if you press slowly,
and stop pressing once cracks begin, you should be good.
Return them to the oven for 1 more minute which helps soften the kisses.
Cool
Transfer to racks, let them cool completely and store them.
The kisses will be soft, so take care.