Preheat the oven to 350°F (180°C).
In a bowl, add all your mix-ins and toss together. Set aside.
3/4 cup (45g) crushed pretzels, 3/4 cup (30g) thick ripple potato chips, 3/4 cup (150g) mini chocolate chips, 3/4 cup (132g) toffee pieces, 3/4 cup (150g) chopped milk chocolate
In the bowl of your stand mixer, cream together the butter, granulated sugar and brown sugar until light in color and fluffy in texture. You will want to mix for about 2 minutes.
1 cup (222g) salted butter, softened, 1 cup (246g) brown sugar, 1/2 cup (115g) granulated sugar
Scrape down the sides of the bowl and add the egg and vanilla. Mix until well incorporated.
1 egg, 1 tsp vanilla extract
Next, add in the flour, baking soda, and salt. Mix until a soft dough forms.
2 1/4 cups (342g) all-purpose flour, 1 tsp baking soda, 1/2 tsp salt
Add your mix-ins and mix on low until evenly distributed.
Portion out your dough using a #12 scoop.
Create a crater in the center of each dough ball and drop in ½ Tbsp of hot fudge. Form the dough around the fudge, sealing it in. Stud the tops with a few extra pretzel and chip pieces for more texture and visual appeal.
1 jar (11oz) hot fudge sundae topping
Arrange 6 dough balls on a parchment lined cookie sheet and bake at 350°F for 12-14 minutes or until the tops no longer look glossy and start to brown slightly.
Once removed from the oven, allow the cookies to cool completely on the pan.
Store in an airtight container on the counter for 3 days or in the freezer for up to 3 months.