This was better, but I was scared that the powdered sugar would get all messed up traveling to his party. So, naturally, I took the easy way out. I grabbed an edible marker and marked some cookies with "30."
Of course, all of this powdered sugar caused an even bigger mess...
1/2 cup butter, melted
2 (1 ounce) squares semisweet chocolate, chopped
1/4 cup cocoa powder
1 cup white sugar
1 teaspoon vanilla extract
1 cup semisweet mini chocolate chips
1/4 cup confectioners' sugar for rolling
1.Sift together the flour and baking powder; set aside. In a medium bowl, stir chocolate and cocoa into melted butter until melted and smooth. Mix in the sugar, eggs and vanilla. Gradually blend in the sifted ingredients. Stir in the mini chocolate chips. Cover dough and chill for at least 2 hours or overnight.
2.Preheat oven to 350 degrees F (175 degrees C). Grease cookie sheets or line them with parchment paper. Roll the chilled dough into 1 inch balls and roll each ball in confectioners' sugar. Place cookies 2 inches apart onto the prepared cookie sheets.
3.Bake for 9 to 12 minutes in the preheated oven, until the tops are cracked. Remove from cookie sheets to cool on wire racks.