Preheat oven to 350°. Line a large baking sheet with a silicone baking mat or parchment paper. Set aside.
In the bowl of a stand mixer or in a large bowl with a hand mixer, beat the peanut butter, white sugar, and brown sugar together on high until creamy and smooth, 2-3 minutes. Add the egg and vanilla and mix until combined.
Using a heaping tablespoon, spoon the dough and roll into 1 1/4-inch balls. Place on prepared cookie sheet and place approximately 2-3 inches apart.
Bake in the preheated 350 degree oven for about 8 minutes.
Within 1-2 minutes of removing cookies from oven, gently press a chocolate kiss into the center of each cookie.
Allow cookies to finish cooling completely on baking sheet before enjoying.