Combine dry coconut flakes, flour, salt and chocolate chips in a bowl. Toss together to combine.
Pour sweetened condensed milk and vanilla over dry ingredients. Stir with a spatula until thoroughly combined. The mixture should be wet, but come together.
With a #40 cookie scoop, lightly pack the scoop and round any coconut pieces that might be stringy on the edges. Make sure that when you scoop the cookies, it's solid enough so it doesn't fall apart when it bakes, but don't overpack it so much that it won't bake through.
Place cookies on a parchment lined baking sheet. Lightly grease parchment with cooking spray. (You can place cookies an inch or so apart; they don't spread much.)
Bake at 350 degrees Fahrenheit for 10-13 minutes. Or until lightly browned on top and bottom.