Preheat the oven to 375°F and line 2 large baking sheets with parchment paper, and set aside. I recommend using 12x17-inch baking sheets.
In a medium mixing bowl, whisk together 2¼ cups bread flour, 1 tablespoon malted milk powder, 2 teaspoons corn starch, 1 teaspoon baking soda, and ½ teaspoon salt and set aside.
In a large mixing bowl or stand mixer fitted with a paddle attachment, cream together ¾ cup salted butter, 1¼ cups light brown sugar, 2 teaspoons vanilla extract, and ¼ teaspoon butter extract for 2½ minutes then scrape down the sides and mix for an additional 30 seconds.
Add 1 large egg and 1 additional large egg yolk and mix just until the yellow streaks are gone.
Add the flour mixture a ½ cup at a time, stirring just until incorporated after each addition. Then mix until fully combined.
Add in 1 cup of the 1¾ cup pecan pieces, 1 cup toffee bits, and ¾ cup butterscotch chips and mix just until incorporated.
Add the remaining ¾ cup of pecan pieces to a small bowl.
Use a #10 cookie scoop to portion out the dough. Release from the scoop and gently use your hands to round out the flatter edge of the cookie dough then press the top of the dough ball into the bowl of pecans so they stick to the top. You can also press in some additional butterscotch chips if desired.
Place the balls of dough 4 inches apart, you can fit 4 cookies on a 12x17-inch baking sheet by placing the balls of dough offset from each other at an angle instead of in a line.
Bake for 9 to 12 minutes. You want the edges to be browning but the centers to still look soft and slightly puffy.
Allow the cookies to cool on the ban for a few minutes before transferring them to a wire rack to cool completely.