How do I make someone get more points instead of 1 after buying a upgrade?

I need to know how to make the player get more points instead of 1 after the player buys a upgrade. I only know how to make his get 1 point per click (Note: I am making a cookie clicker game) The normal script:

script.Parent.MouseButton1Click:connect(function(mouse)
script.Parent.Parent.CookieValue.Value = script.Parent.Parent.CookieValue.Value + 1
end)