Preheat oven to 350°F. Lightly spray or grease a large cookie sheet.

Place peanut butter, Nutella, sugar and the egg in a medium bowl. Using an electric mixer, beat them together until they're combined, creamy and smooth.

Drop the dough by rounded teaspoons onto greased cookie sheet, leaving about 2" between each cookie. If you have a small cookie scoop, it will make this step easier! You should have enough dough to make approx. 20-24 cookies.

Slightly flatten each dough ball and use your hands to shape it into a circle. Make a crisscross pattern on the cookies by simply dipping a fork into water, then into a tiny amount of (add'l.) sugar. The sugar should stick to the wet tines of the fork. Lightly press down the fork tines onto the surface of each cookie. Rotate the fork a quarter turn; do this step again over the first impression. As needed, reapply water and sugar to the fork. Continue until all cookies have crisscross pattern.

Bake at 350°F. for 11-14 minutes. Check cookies at the 11-minute mark, because oven temps can vary, and you don't want them to burn! When done, the cookies should be set around the bottom edges. Remove them from oven; let cookies cool 2-3 minutes on baking sheet before transferring them to wire racks to finish cooling.

Serve the cookies once they are at room temperature (they will slightly crisp up as they cool). Enjoy!