In line with the Nutella tart, I make mini chocolate pizzas. They use prepackaged stuff but you could make it all from scratch if you wanted:

1 roll sugar cookie dough
1 jar Nutella
assorted chips: dark chocolate, white chocolate, peanut butter chips

I slice the roll into cookies and put onto parchment paper. Spread Nutella on each and sprinkle with choice of chips and bake according to cookie roll instuctions. It is ridiculously easy but everyone loves this! I got the idea from Giada but couldn't find her recipe online, so this is what I came up with. She spread the dough out to make a large pizza but I like the little ones better!