Set the oven to 350°F. Put parchment paper on a baking pan and set it aside.

For two minutes, combine butter, brown sugar, and granulated sugar in a bowl.

Mix in the eggs and vanilla after adding them. Use a spatula to clean the bowl's sides.

Mix in the salt, cinnamon, baking soda, flour, and oats. Add the chocolate, peanut butter, and toffee chips. To integrate, stir.

To portion the cookie dough into balls, use a 1/4 cup.

With the palm of your hand, press each ball into a thick disk. Put 6 on each baking sheet. The tops should be salted with flaky salt. The centers will still seem a little underdone after baking for 9 to 11 minutes, but they will continue to cook on the baking sheet and should be set and softly golden brown.

After taking it out of the oven, let it cool for 5 to 10 minutes on the baking sheet before moving it to a wire rack to finish cooling.