Preheat the oven to 350 degrees. Line a muffin tin with black cupcake liners.

In a small bowl combine the flour, cocoa powder, and salt. Mix well and set aside.

In a large bowl cream together the butter, sugar, and brown sugar.

Add in the egg, blue food coloring, and vanilla and mix until well combined.

Add half the flour mixture and mix well. Stir in the milk. Add the remaining flour mixture and mix until just combined.

Combine the baking soda and vinegar in a small bowl. Mix well.

Pour the vinegar mixture into the cupcake batter and mix well.

Divide the batter between the 12 cupcake liners. Bake for 22-25 minutes.

Remove from oven and cool completely on a wire rack.

To make the frosting put the butter in a bowl and beat with a mixer on high speed until creamy.

Add the powdered sugar a cup at a time, beating after each addition.

Add the vanilla and milk and mix well.

Divide the frosting into two bowls. Add black food coloring to one bowl and blue to the other. Mix well.

Pour the black frosting into a piping bag and the blue frosting into another piping bag. Place both of these bags into another piping bag with a swirl tip in it. Pipe the double colored frosting onto the cupcakes to make a galaxy background.

To finish off the cupcakes sprinkle them with the pink, purple, blue, and black Milky Way Sprinkle Mix. It also has silver stars in it to make the cupcakes look like a galaxy.

Enjoy!