Break whole pecans in half (and smaller if desired). Melt 1Tbsp butter in a saucepan over medium heat. Add in the pecans. Cook and stir over medium heat for 4-5 minutes. **Don't turn up heat...they can burn very suddenly!Set aside to cool.
Add the ½ cup butter and both sugars to a mixing bowl or stand mixer. Cream with beaters for 3-4 minutes until creamy.
Add egg and vanilla. Mix until just combined.
Add flour, salt & baking soda. Use a fork to mix the salt and baking soda into the flour. Stir altogether until cookie dough is well mixed.
Add in most of the pecans and toffee bits, keeping about ¼ cup aside to top the cookies.
Wrap the dough in plastic wrap and refrigerate for at least 30 minutes.
Remove from the refrigerator when ready to bake. Preheat oven to 350°.
Use a scoop and place dough on a cookie sheet with parchment paper or a silicone baking sheet. Flatten cookie tops with your palm or a cup. Place pecan halves and toffee bits on top of each cookie.
Bake for 10-13 minutes until edges are just turning golden.Cook on a rack. Store in a covered container.
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