Thanks for all the suggestions, peeps. I ended up using a recipe from my 1938 copy of The American Woman's Cookbook, after I couldn't find my Joy of Cooking. I veganized it, and it ended up working great. I used a mini skull cookie cutter, iced them when they were finished, and gave them chocolate chip eyes and almond sliver teeth.
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Cookie Cutter Sugar Cookies
2 1/4 cups sifted flour
1/4 teaspoon salt
2 teaspoons baking powder
1/2 cup margarine
1 cup sugar
2 eggs' worth of egg replacer (I used Ener-G)
1/2 teaspoon vanilla
1 tablespoon milk (I used Silk creamer)
Sift flour, salt and baking powder together. Cream margarine and sugar together, add egg replacer and vanilla, then add sifted ingredients and milk. Roll and cut. Sprinkle with sugar and bake on baking sheet in moderate oven (375 F) 12 minutes. Makes 2 1/2 dozen cookies.
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Since mine were minis I ended up with a lot more than 2 and a half dozen, and since I was icing them I didn't sprinkle them with sugar before I baked them. My icing was just powdered sugar, water, and vanilla; I just kept adding sugar till it got to a spreadable consistency.
I got lots of compliments on them, so thanks again!

