Preheat oven to 375 degrees Fahrenheit.  Line a baking sheet with parchment paper.  

If using regular eggs skip this step.  If using an egg replacer: In a small bowl combine either 1 tbsp finely ground flax meal with 3 tbsp water OR 1 tbsp Bob's Red Mill Egg Replacer with 2 tbsp water and let sit for 2-5 minutes before adding to recipe.  

In a large bowl or stand mixer cream together shortening, peanut butter, and sugars until fluffy.  Add the egg or egg replacer, milk, and vanilla and mix thoroughly.  

In a medium bowl whisk together the flour, baking soda, and salt.  

Slowly add the dry ingredient to the wet until well incorporated.  

Form dough into 1" balls and roll in sugar before placing on parchment paper lined baking sheet.  Bake for 8-10 minutes until edges are just slightly brown. 

Remove from oven and immediately press hershey's kisses into the center of each cookie*. The edges of the cookie will crack slightly, push the kiss in carefully. You can also use a 1/2 tsp measuring cup to make a dent in the center of each cookie and sprinkle enjoy life chocolate chips in, they will melt.  

Let cool on baking sheet for about 5 minutes before transferring to wire cooling rack to cool completely.  Store in an airtight container at room temperature for up to 4 days.