Preheat oven to 350 degrees F. and line a large cookie sheet with parchment paper.

In a large mixing bowl or stand mixer, cream butter and sugar and stevia until well combined. Stir in eggs and vanilla mixing until well combined. Slowly add flour, oats, baking soda, salt, toffee bits and chocolate chips. Stir until dough forms. Scoop dough onto prepared baking sheet placing 1 inch apart from each other. Bake for 12-14 minutes, until golden around edges and baked through.