What is the best recipe for funnel cake?

There are tons of recipes all over the internet but I dont know which ones will actually work. I used a internet recipe today and I followed it exactly but the batter was way too thick, even when I added a lot of milk. It was really hard to squeeze out of the tube. I want to perfect my funnel cakes for a bake sale next month, so what is the best recipe to use to make the batter? (And I like making lots, so there are more servings per batch. Recipes with a larger scale factor wouls be great)