In a small bowl, melt the butter for 1 minute in the microwave. The butter will be mostly melted with some unmelted pieces. Stir to combine and and cool in the fridge for about 20 minutes.
1 cup (226 g) unsalted butter, melted and cooled
In another bowl whisk together the flour, baking soda and salt until well combined. Set aside for now.
3 cups (360 g) all purpose flour, 1 teaspoon baking soda, ½ teaspoon salt
In a large mixing bowl, whisk the cooled melted butter, sugar and light brown sugar for 1 minute, until smooth well combined. Whisk in the eggs and vanilla extract until smooth and well combined. Stir the dry ingredients into the wet until just combined.
1 cup (200 g) light brown sugar, ½ cup (100 g) granulated sugar, 2 large eggs, room temperature
Gently fold in the chocolate chips, potato chips, pretzels and toffee bits until combined. Cover the cookie dough and transfer to the fridge to chill for at least 30 minutes while the oven preheats.
¾ cup (128 g) milk chocolate chips, ¾ cup (128 g) semi sweet or dark chocolate chips, 1 cup (40 g) potato chips, crushed , 1 cup (40 g) pretzels, chopped , 1 cup (240 g) toffee bits or caramel bits
Preheat the oven to 375 F (190 C) for about 30 minutes before baking the cookies. Line a large baking sheet with parchment paper. Using a medium cookie scoop (2 tablespoons, 30 ml), scoop the kitchen sink cookie dough into balls and place them onto the lined baking sheet about 3 inches (8 cm) apart. Top with more chocolate chips, potato chips, toffee bits or pretzels if you like. Bake at 375 F (190 C) for 10 - 12 minutes or until the edges of the cookies are set and are a light golden brown. The center of the cookies will be slightly puffed up. Cool the chewy everything cookies on the baking sheet for 5 minutes. Then transfer to a cooling rack, top with flaky salt if you like, cool completely to room temperature and enjoy.