In a large bowl stir together 3 cups all-purpose flour, 1 1/2 cups packed brown sugar, 1 tsp. ground cinnamon, and 1/2 tsp. salt. Stir in 2/3 cup miniature semisweet chocolate chips. Drizzle with 1 cup melted butter and 1 tsp. vanilla. Toss with a fork to combine.