Preheat oven to 375 F and line 2 baking sheets with parchment paper. Set aside.
In a medium bowl cream together shortening and sugars until smooth. Add peanut butter and mix again.
Add in egg, milk and vanilla and mix until fully incorporated.
Add baking soda, salt and flour and mix until just combined. Do not over mix dry ingredients.
Using a 2 teaspoon cookie scoop, scoop dough into balls and roll in sugar. Place on prepared cookie sheets. These cookies do not spread much, so you can place about 20 per cookie sheet. Sprinkle cookies with a little flaked sea salt.
Bake cookies for 8-10 minutes, or until cookies are beginning to crinkle and puff up a bit. As soon as you've removed the cookies from the oven, stick a hershey kiss on top of each cookie. Place cookies into the fridge for about 10-15 minutes after so that the chocolate remains firm.
Notes
These cookies can be stored for 2-3 days in an airtight container, or in the freezer for 2-3 months.These cookies work great with all different flavors of hershey kisses as well. We have tried and loved the plain chocolate, caramel center and peppermint.Make sure room temperature ingredients are used to help the batter mix together properly.I have given both cups and grams as measurements. Grams will be more precise, especially when measuring flour. If you don’t have a kitchen scale, no problem! Just lightly spoon flour into your measuring cup to insure its not packed in there. Light and fluffy is the key.