Step 1

Combine the oats, flour, milk powder, salt and baking soda. Mix well and set aside.

Step 2

In an electric mixer combine the butter with the sugar and the brown sugar. Mix well, for 2-3 minutes.

Step 3

Add in the egg and the vanilla and mix well for several minutes, until very light and fluffy.

Step 4

Add the dry ingredients to the butter mixture and mix until just combined.

Step 5

Fold in the toffee bits, if using.

Step 6

Drop scoops of dough onto a baking sheet (I use a 2 1/2 Tbsp cookie scoop).

Step 7

Bake at 350 for 9-11 minutes.

Step 8

Remove and allow to cool before drizzling on the glaze.

Step 9

Combine the browned butter, vanilla and powdered sugar in a small bowl.

Step 10

Add in the powdered sugar and mix. Add milk to thin, if needed.

Step 11

Drizzle on the cooled cookies.