Preheat oven to 325 degrees F (165 Celsius). Line a cookie sheet with parchment paper or Silpat.

In bowl of food processor (or use a mini grinder), grind oats. Mix the ground oats with flour, baking powder, baking soda and salt.

In a mixing bowl, beat butter and both sugars with high speed of electric mixer. Beat in vanilla and egg and beat for another 30 seconds. Add flour mixture and stir until mixed in. Stir in nuts, chocolate and toffee

Drop by rounded tablespoonfuls onto baking sheets spacing 3 inches apart. Bake one sheet at a time on center rack for 15 minutes or until they appear brown around edges.

Let cool on sheet for 2 minutes, transfer to a rack to cool.