Does anybody have a good recipe for a Margueritta Cake?

I helped make cupcakes once, but I don't remember the exact amount of each item, you'll have to experiment. We crushed pretzels in a food processor and added some melted butter to make it a little doughy. Pressed that into cupcake pan. White Duncan Hines cake mix made by package directions, with the exception of adding liquid margarita mix instead of water, juice from a lime and 1/2 box instant vanilla pudding. Spoon onto pretzel crumbs. Bake until done. Frosting was buttercream with tiny bit of green food coloring and then we cut strips of lime zest for the decorations on top. We must have done something right, they sold for $4 each and we sold all 24 in the first day!