DIY FILE: Build a bath bomb Birthday


Diamonds are nice but most of us women know that girlfriends are really a girl's best friend. They are there with you through the bad breakups, haircuts and every questionable outfit in between.

So on her birthday, you want your sister-friend to have the very best. But because you can't afford to give her what she really wants - a gift-wrapped Sam Worthington or pair of camel-coloured Fryes - maybe it's better to go with something from the heart.

And what is more heartfelt than the gift that requires you get in the kitchen?

Although, with these cupcake bath bombs from the bloggers of Little Birdie Secrets, you can provide your bestie with the princess pampering she deserves without the shelf life or calories of the actual dessert. And the cost? Just icing on the cupcake. Note to guys: don't let the frosting fool you, these are soaps for the bath and are in no way edible. Not even a little bit!

What you need:

Cupcake base:

- 2 cups baking soda

- 1 cup citric acid (find at Famous Foods, aisle 3)

- 1 Tbsp. oil of your choice (almond, olive etc.)

- 5 drops fragrance/essential oil

- 3-5 drops colouring

- Witch hazel (poured into a spray bottle)

- Paper cupcake liners

- Silicone cupcake molds

- *optional (find online here): 1 tsp. Bentonite clay (makes them harder)

- 1 tsp. to 1 Tbsp. of sodium lauryl sulfate (good for extra lather)

Fizzy frosting (Royal Icing recipe):

- 3 Tbsp. meringue powder or powdered egg whites

- 1 lb. (measured by weight) powdered sugar

- 1/4 tsp. cream of tartar

- 5-6 Tbsp. warm water

- a few drops of colour

- glass bowl

- hand mixer


- First off, it's important for you to know it's not as hard as it looks.

- Put your paper liners inside your cupcake moulds. (step 1)

- Gently mix all the dry ingredients into a large bowl. Do not inhale! (step 2)

- Add fragrance to the dry mixture. Then measure out the oil and place a few drops of colour in it. Add this to the dry stuff and then gently mix.

- Note: Food colouring can stain, so special oil for bath products is an option.

- While kneading the mixture by hand, start spraying it with the witch hazel. Don't get the mixture too wet - the moisture will

activate the citric acid and your bath bomb will be ruined. Keep spraying the mixture with witch hazel and squish it in your hands until it has the consistency of crumbly pie dough.

- Quickly pack the mixture into your cupcake liners in the silicone moulds. Pack it tightly. Allow it to set in the mould for at least five to 10 minutes before removing. (steps 3 and 4)


Mix meringue powder into warm water in a glass bowl. Add cream of tartar and some powdered sugar. Start beating on high. If your mixture feels like stiff cookie dough at this point, add another tablespoon of water. Beat for seven to nine minutes - the frosting is done when it forms stiff peaks and is thick and fluffy.

- Add colour and fragrance and beat until well mixed (one minute or less). Note: If you choose to add baking soda (for fizziness) and sodium lauryl sulfate (for lather), you should increase your water to about six to seven tablespoons. Add them in with the colour and fragrance.

- Spoon frosting into a cake frosting bag with a cake decorating tip.

(step 5)

- Frost your cupcake bath bombs and allow them to sit overnight to harden.

- Little Birdie Secrets recommends wrapping soaps in cellophane bags with decorative ribbons and tags for that special touch.

Call for submissions

Every week, Julia Dilworth's DIY File features do-it-yourself projects, big and small. To submit a project or send photos of your DIY attempts, email julia.dilworth[at]

You can also find her on Twitter at @JuliaDilworth