Step 1

Preheat oven to 365 degrees. In a large mixing bowl, cream butter, brown sugar, and sugar for 4 minutes or until light and fluffy. Scrape the sides of the bowl halfway through to ensure even mixing.

Step 2

Add eggs and vanilla and mix for 1 minute longer.

Step 3

Stir in flour, rolled oats, cornstarch, baking soda, and salt. Add cinnamon (if using). Fold in raisins.

Step 4

Drop onto a light-colored baking sheet. Bake for 9-11 minutes or until edges start to turn a light golden color. Don't overbake. The cookies will continue to bake once you remove them from the oven. I prefer to under-bake rather than over-bake.

Step 5

Let cool on the baking sheet for at least 5 minutes.