In stand mixer, beat butter and sugar for 3-4 minutes, will be light and fluffy. Add eggs and vanilla until well combined. Slowly add flour, chocolate, chips, marshmallow bits and toffee. Mix until just combined. With a medium cookie scoop, scoop dough onto prepared baking sheet, about 1 inch apart. Bake for 10-12 minutes, until baked to your liking. Remove and let cool for 5 minutes on baking sheet before transferring to cooling rack.
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