Way back in elementary school, my friends and I used to exchange little notes, written in glittery Gelly Roll pen on cute Sanrio stationery. (Remember the days of gel pen collections?) Anyway, each of us in the group had our own "signature" cartoon characters that we would draw on our letters. There were monkeys, cats, dolphins, dinosaurs, and, of course, my turtles. I didn't choose to draw turtles because I particularly liked turtles (because honestly, non-cartoon turtles aren't all that cute... sorry turtle lovers).
The main reason was that I wasn't very good at drawing cartoons (even now, ask me to draw a realistic portrait and I can do it, but tell me to draw some sort of anime character and I'm like @_@). But, I found cartoon turtles relatively easy to draw, just a bunch of circles, dots, and lines. Which, more importantly, means that they adapt to icebox cookie form very well. So I took my old turtle, spruced it up a little, and turned it into a cookie :).
2 tbsp matcha powder
Make the vanilla icebox cookie dough until it says STOP (for modifications). Split the mixture that you have so far in thirds and set aside for now. Get two separate bowls. To one bowl, add 3/4 cup + 2 tbsp flour and 2 tbsp matcha powder. Mix thoroughly.
Add one third of the previously split mixture and mix until you get a dough. To the other bowl, add 1 1/2 cups flour. Add the remaining two thirds of the previously split mixture and mix. Now you should have one matcha cookie dough and one vanilla cookie dough.
Take the cookie cutter and cut off part of the circle to form crescent shapes for the turtle heads. Use a big straw (like the ones for pearl milk tea) to cut out small circles. Use a knife to cut each circle in half. Now take 1 log slice, 1 crescent, and 5 small semicircles (4 for the feet and 1 for the tail) and stick them together to form a turtle.