Oatmeal Chocolate Chip Cookies

1 c dairy free butter

1 c light brown sugar firmly packed

½ c granulated sugar

2 eggs

2 tsp vanilla extract

1 3/4 c ap flour

2 tsp cornstarch

1 tsp baking soda

3/4 tsp salt

2 1/2 c old-fashioned rolled oats

10oz chocolate chips