Line a large baking sheet with parchment paper and preheat the oven to 350°. In a large bowl add the butter and sugar and beat using a hand mixture until everything is creamy. Add the vanilla and eggs and mix again.

In a medium sized bowl add the salt, cream of tartar, baking soda and flour and stir. Slowly add the dry mixture into the wet mixture little by little and mixing with the beater in between.

Add the Poptarts but leave about 1/3 of a cup of pieces to the side for topping later. Add the sprinkles as well, mix once again until everything is well mixed together.

Scoop about 2 tbsp of dough out and roll into a ball, place down on the cookie sheet leaving at least 2 inches in between. If you don’t want the glaze on top of the cookies later, place the leftover Poptart pieces into the top of the cookies now.

Bake for 11-12 minutes. Let the cookies cool for a bit and then transfer to a cooling rack. While cooling make the glaze, in a medium bowl add the powdered sugar and heavy whipping cream, mix with the hand mixer once again until a glaze forms.