My hubby is obsessed with chocolate and peanut butter. I am always trying to find new cookie recipes with this combinations....but there is only so much you can do with chocolate and peanut butter. The I found this recipe. And I love to do cookies with things stuffed inside so this was perfect. I got the recipe from Sally's Baking Addiction. Go visit her site. She has some amazing pictures. She also did a drizzle on her cookies that I omitted on mine. I did copy and paste her instructions because they were excellent. =)
In a large bowl using a hand-held mixer or stand mixer with paddle attachment, cream the butter, brown sugar, and white sugar together on medium speed until combined. On low speed, beat in the peanut butter, egg, and vanilla. Turn the mixer to high and beat until light in color and smooth. Turn the mixer to low and slowly pour in the dry ingredients. Mix until combined and a dough is formed.
Cover tightly and chill the cookie dough for at least 1 hour (or up to 3 days). Chilling is mandatory.
Remove cookie dough from the refrigerator. Preheat oven to 350F degrees. Take 1 Tablespoon of dough and roll into a ball. Take another 1 Tablespoon of dough and roll into a ball. Stick a peanut butter cup into one ball, kind of like a "cradle" as shown above. Top the peanut butter cup with other cookie dough ball and seal down the sides so that the peanut butter cup is securely stuffed inside. Roll the large cookie dough ball in your hands to ensure it's smooth. Repeat with the rest of the dough and 18 peanut butter cups.
Bake the cookies for 10-11 minutes or until very lightly browned on the sides. Some cookies may be taller than others, depending how the peanut butter cup was positioned inside. Just press the cookies down a bit to flatten them out. Allow to cool on the cookie sheet for at least 10 minutes and transfer to a wire rack to cool completely.
Cookies stay fresh stored covered at room temperature for up to 7 days. Cookies freeze well, up to 3 months. Stuffed cookie dough balls freeze well, up to 2 months. Bake for 2 extra minutes, do not thaw.
*Room temperature egg is required for the cookies. General rule of thumb I use for my own cookie recipes: when using warm or room temperature butter, I always use room temperature egg as well. To bring egg to room temperature quickly, simply place in a cup of warm water for 5 minutes.
*Thick, store-bought peanut butter is preferred. If using natural style, make sure the peanut butter is thick and not oily in the slightest - which will make your cookie dough thin, slippery, and spread all over the baking sheet even after chilling the cookie dough. You need thick, non-oily peanut butter like Jif or Skippy.