Chunky Twix Cookies

I LOVE TWIX!!! Seriously. So does Michelle F, soo we decided to make Twix cookies. I found the recipe on Lovin' From the Oven, who found it on Sprinkled with Flour. These were really good, but for some reason they came out really hard though we followed the recipe exactly (except we used dark brown sugar instead of regular brown sugar). Hmm... Next time less sugar? Or bake for a shorter period of time...or less mixing...or something.

Apparently you can float cookies on small Corelle plates in your pool:

• 2 cups flour
• ½ tsp. baking soda
• ½ tsp. salt
• 12 tbsp. unsalted butter, softened
• 1 cup packed brown sugar
• ½ cup granulated sugar
• 1 large egg plus 1 egg yolk
• 2 tsp vanilla extract
• 2 cups coarsely chopped Twix bars
  
  (1) Preheat oven 325°
  (2) Whisk together flour, baking soda & salt in a medium bowl; set aside.
  (3) In a separate bowl, cream together the butter &sugars. Beat in egg, yolk, and vanilla until combined.
  (4) Slowly add dry ingredients to wet ingredients
  (5) Gently stir in the Twix chunks
  (6) Roll dough into balls & bake on a baking sheet for 15-18 min
  (7) Allow cookies to cool for 10 min before removing them from baking sheet