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Bath Bomb Cupcakes

Cool Science

overview

bath bombs are *always* in style for a scented, spa-time treat. and this presentation, in the silicone cupcake molds, is such a perfect way to package them for gift-giving. super cute and stays in shape!

45 minutes

maker checklist

  • 1/2 cup corn starch
  • 1/2 cup epsom salt
  • 1 cup baking soda
  • 1/2 cup citric acid
  • 1 tsp. olive oil
  • 1 tsp. water 
  • 1 tsp. essential oil
  • food or soap coloring
  • pipette
  • mixing bowl + spoon
  • silicone cupcake molds
  • half-sphere mold (optional)

instructions

1

combine the dry ingredients in a large bowl, and mix them well.

2

combine the olive oil, essential oil and water in a small bowl; stir gently.

3

dribble the wet ingredients into the dry ingredients using a pipette or a very steady, slow pour.

important! add the wet ingredients to the dry ingredients drop by drop, stirring continuously as you do, so the mixture doesn’t fizz and bubble up.

4

mix! ultimately, it should feel like fluffy, damp sand that stays together when you squeeze it in your hand.

tip! if it’s too dry, add a drop of water or oil, but be careful not to get it too wet!

5

color your mixtures by separating the white mixture into small bowls and adding food coloring or soap colorant to each.

tip! mix a few colors, but reserve a bowl of plain white for layering and contrast!

6

layer the colors into a cupcake mold until you’ve created a small mound on top, packed tightly.

7

pack a bit more of the mixture into a small bowl that is about the same size as your cupcake mold.

 

8

invert the domed top onto the cupcake; pressing firmly so the layers adhere. lift the dome and voila!

tip!

give the dome a tap to loosen the mix before lifting the cap.