English Toffee Sugar Cookies

My son loves soft sugar cookies. I made him a batch and decided to use the Heath's English Toffee Bits I bought on sale and make another batch. The hubby was my test tester on these. After "Mmmmm!" and "Oooooo!"-ing and 6 cookies later, he declared that they are delicious!

2 1/2 cups self rising flour
1 cup (2 sticks) butter, softened
1 1/4 cup granulated sugar
3 egg yolks
1/2 teaspoon vanilla extract
1/2 to 1 cup Heath's English Toffee Bits
1/4 cup granulated sugar, for rolling

Preheat oven to 350 degrees. 

In a large bowl, using an electric or stand mixer, cream together the butter, and granulated sugar until combined. Add egg yolks and vanilla extract. Add flour and mix until just combined. Using a spoon fold in the toffee bits. I used 1 cup, but use as little or as much as you like. We like a heavy toffee taste. Use a cookie scoop to scoop dough into balls, roll in sugar and place onto a baking sheet. Bake for 12 minutes or until tops of cookies start to crack. Let cool for 5 minutes on baking sheet before moving them to a wire rack. Let cool completely on wire rack.