The recipe methodology for each is the same, only the ingredients differ.
1/ 1/4 cups of __________, crushed (put in a double Ziploc bag and crush with your hands, a mallet, or a rolling pin until the consistency that you want- I recommend pea-size or smaller)
1/2 cup brown sugar
3/4 stick butter/margarine, melted
Mix the three ingredient together in a mixing bowl and then form into a pie pan (or glass dish, if you are making lemon bars, etc.)
Your five options?
*Pretzels: almost ends up with a caramel flavor
*Saltine Crackers: ends up very close to shortbread
*Ritz crackers: also ends up similar to shortbread
*Chips-a-hoy: kinda ends up tasting like a cookie-dough crust
*Ramen noodles: yes, dried ramen noodles crushed up (VERY finely) turn out great. Also shortbread-esque, but worth trying just to be surprised at how well it turns out.