I'm going to show you how to decorate cupcakes for a boy's birthday. I'm going to use different shades of blue. I'm going to color our white buttercream with some blue food coloring. I put in one drop at time. A little bit goes a long way, and you can always add more. I'm looking for a dark blue now. Just incorporate that really well. I think I'll add a few more drops. There, that's a really nice blue. Just keep mixing until you don't see any more streaks of white.
I'm going to put that into a pastry bag with a small round tip. When you fill a pastry bag, you don't want to go more than half way. I'm going to use the dark blue to write, so we're not going to use that much. You're just going to put about half a cup in there, squeeze it to the end, and make sure you squeeze out a little bit before you start writing so you don't have buttercream exploding on your cupcake. Then I'm going to grab our light blue pastry bag with the large round tip, and this is going to be the base of our frosting.
What I'm going to do is start in the center, hover a little over the cupcake, and make a nice round swirl. Now that we have our light blue in here, I'm going to take our dark blue pastry bag. Let's say this is for a fourth birthday party, so I'm going to write the number four really big right in the center. Make sure your tip is hovering over the cupcake so you get a nice straight line. Number four.
And for another cupcake, we're going to take our same light blue pastry bag and do the same exact swirl. I'm going to use our blue sanding sugar. This is a really great color, it adds a really great contrast to the light blue. Just sprinkle it right on top, as much as you want. I like a lot of sprinkles. If you're making a dozen of them, you can do six of these, six of these. If makes a really nice combination and a really delicious birthday cupcake treat. That's how you make cupcakes for a boy's birthday.