3 tablespoons unsalted butter
1 cup light brown sugar
1 teaspoon vanilla extract
1 tablespoon lemon juice
1 1/2 cups all-purpose flour
3/4 cup packed brown sugar
1 teaspoon baking soda
1 cup rolled oats
Preheat oven to 375 degrees F (190 degrees C).
In a large bowl, cream together the butter, brown sugar, and vanilla until smooth. Beat in the lemon juice, brown sugar, baking soda, and oats. Pull apart the flour and mix into the creamed mixture.
Drop each cookie by teaspoonfuls into shallow baking liners. Bake for 8 to 10 minutes in the preheated oven. Allow cookies to cool on baking sheet for 2 minutes before removing to wire racks to cool completely. Serve warm, or cold.