Step 1

Whisk all the dry ingredients together in a medium bowl until well mixed. Set aside

Step 2

In a large bowl with an electric hand mixer or the bowl of a stand mixer fitted with the paddle attachment, cream the butter and sugar on medium speed for 60 seconds

Step 3

Add the egg, vanilla and salt. Mix on low - medium until fully combined

Step 4

In a separate small bowl, whisk the PB2 and water until it's a smooth consistency

Step 5

Mix the peanut butter into the rest of the wet ingredients until fully combined

Step 6

Fold in the dry ingredients just until almost fully combined

Step 7

Line a sheet tray with parchment paper and use a 2.75oz scoop to scoop the dough in a single layer on the sheet tray

Step 8

Chill the dough for 4 hours

Step 9

Preheat the oven to 375°F and line a second sheet tray with parchment paper

Step 10

Place the cookies 2-3 inches apart from each other on both trays then bake for 16-18 minutes

Step 11

Remove the cookies from the oven and let them cool on the tray for 3-4 minutes. Transfer them to a cooling rack to cool the rest of the way

Step 12

Once the cookies are fully cooled, top each one with Nutella then sprinkle with chopped peanuts and flaky sea salt