Preheat the oven to 325 degrees and prepare a cookie sheet lined with parchment.
Use two spoons to spoon out about 1 teaspoon of Nutella onto parchment paper. Repeat 25 times. Place in the freezer (at least 20 minutes).
Use two spoons to spoon out about 1 teaspoon of Nutella onto parchment paper. Repeat 25 times. Place in the freezer (at least 20 minutes).
In the bowl of an electric mixer fitted with the paddle attachment, on medium speed, beat melted butter and both sugars until well combined. the bowl of an electric mixer fitted with the paddle attachment, combine melted butter and both sugars (on medium speed) until well combined.
Reduce speed to low and add egg, egg yolk and vanilla. Beat until well mixed, about 1 minute.
Slowly add the dry ingredients and mix until just combined.
Stir in chocolate chips and chopped pretzels.
Using a medium scoop to scoop out cookie dough ball. Using the palm of your hard flatten the ball.
Place a frozen ball of Nutella in the middle.
Start at the edges of the dough circle and scrunch dough around the Nutella to completely cover it.
Roll into a ball and place a pretzel on top.
Bake for 12-14 minutes.
Let cookies cool on the baking sheets.