Preheat your oven to 350F.
Using parchment paper, line a large cookie sheet.
Using a stand or hand mixer, beat the peanut butter for a minute.
Add in the stick of butter, granulated sugar, and brown sugar with the peanut butter. Add in the vanilla bean paste and egg. Beat again.
Combine flour, baking soda, and salt into a medium bowl.
With your stand or hand mixer on low, slowly pour the flour mixture in with the peanut butter and sugar mixture.
Using a tablespoon, scoop dough out and place onto the cookie sheet 1 inch apart. If you want larger cookies, you can use a full-sized ice cream scoop.
Bake for about 10 minutes. Cookies should be firm but not hard and edges should be slightly browned but not overly dark. Allow to cool completely before the final step.
To add the mummy face, add icing in a zigzag motion across the cookie. Be sure to leave gaps and to not entirely fill the cookie in with the icing. Add the candy eyeballs (or chocolate chips, M&Ms, or black dots of icing in a pinch) and enjoy!