Whether you make your pancakes from scratch or from a mix, whip up a batch and start stirring. I made two different batches - one with regular green food coloring (which turned out mint green) and one with neon green food coloring (which turned out light greenish/yellow. Both should be available at your local grocery store. The neon green looks great for making slime but really doesn't have the same effect as regular food coloring. I used 10 drops of food coloring for each.
Another thing to note: the original post shows bright green pancakes that barely look like they touched a hot surface.. Here's an example of what it'll look like if you use a little PAM and a lot of PAM:
So you don't really see the color until you cut into them or look at the sides. Just something to consider when making these - it never turns out like the original!
And the neon green waffles? They just looked yellow.
If you have Wilton food coloring gel, your color will surely be more vibrant than if you use McCormick food coloring... but honestly, which are you more likely to have on hand?
Moral of the story: don't always believe everything you see on the internet.
TOTAL COSTS: Depends on if making by scratch or mix
TOTAL AMOUNT OF TIME: 10 minutes
Of course, this varies on how much you're planning on making
EASY-PEASY SCALE (1 super easy - 5 very difficult): 1 out of 5
Unless you've never made pancakes or waffles in your life, this should be a piece 'o cake for you and your wee ones!