I saw this recipe in Cooking Light, but it is from a cookbook called Radically Simple: Brilliant Flavors with Breathtaking Ease. I couldn’t find the recipe online so there is no link, but you can see it below.
13oz jar Nutella
2Tbs unsalted butter, room temperature
1 extra large egg
1 1/4 cup self-rising cake flour
1. Preheat the oven to 375. Line a rimmed baking sheet with parchment. Beat together 3/4 cup of the Nutella, the butter, and egg. Slowly add the flour until a wet dough forms. Turn the dough out onto a floured surface and knead gently, adding more flour if needed. The dough will be sticky. Divide the dough into 18 pieces and roll each into a perfect ball, flouring your hands as you go. Place several inches apart on the baking sheet. Bake 12 minutes, until firm. Cool 10 minutes on the sheet.
2. Using a knife, split each cookie in half horizontally. Spread each bottom half with 1 tsp Nutella. Replace the tops, pressing lightly.