I know this is a little late to make for valentine's day but, heck who wouldn't want a heart shaped cupcake any day? I saw this on my local news last week.
1- Prepare your cake batter as usual.
2-line cupcake pan with paper liners.
3-fill cups 2/3 full as usual.
4-slide a glass marble between the paper and the pan. This will cause the paper to crease inwards forming a "V"
5- bake as usual, let marbles cool before handling them... trust me, they stay hot for a while.
This is what you get:
How simple is that?
You can also make heart shaped brownies in the same way. I made both for my kindergarten daughter's class today. Her teacher (mrs. hart!) looooved them.