Preheat oven to 425°
Place flour, sugar, baking soda and baking powder in bowl of food processor. Pulse to mix.
In separate bowl, mix buttermilk, egg, and vanilla. Set aside.
Measure out ¾ cup of toffee bits
Cut butter into pieces. Place in bowl of food processor and pulse until mix resembles small peas.
Pour in milk, egg and vanilla mixture. Pulse until incorporated into large crumbs.
Add toffee bits and pulse until mostly incorporate. Don't over mix.
Pour out mixture onto floured surface. Knead until completely incorporated. May be crumbly.
Using hands or rolling pins, form into large rectangle or circle. Sprinkle top of mixture with a light dusting of flour. Cut into triangles.
Place on prepared baking sheet - lined either with silicon baking pad or parchment paper.
Bake for about 15 minutes or until golden brown.
Let cool on baking sheet for 10 minutes. Remove to rack to finish cooling.