DIY Conversation Bubble Hearts Bubble Bar Recipe

Okay, I just had to do one more Valentine’s Day recipe before January was up. Honestly, this was going to be a paid recipe but I thought, what the heck! I just love you guys so much this will be my valentine to all of you <3

When I first put together this recipe, at the end of December, I was thinking of different bubble bars to package with the Pink Cloud Bath Bomb as a Valentine’s gift set. I wanted something small enough for a single bath since the bomb will be used for a single bath as well. Then the idea of little conversation bubble heart bubble bars came to mind!

Now you might notice mine haven’t had the “conversation” bit added to them in these pictures. That’s because one of the complications of this pregnancy for me has been some unsteady hands. So I didn’t want to tarnish my beautiful little bubble hearts with sloppily painted Valentine’s expressions. But please add them to yours! Bite Me, Hug Me, Luv U, I’m Yours…add them all!

These little bubble hearts are more than fun to look at too, they’ll give your Valentine an emollient bubble bath that they won’t soon forget. So let’s start with the recipe:

Conversation Bubble Heart Bubble Bars

A small and sweet Valentine’s gift for the most special of people in your life. Creates a soft, emollient bubble bath.


Dry Ingredients

  • 5 oz Baking Soda
  • 5 oz Sodium Lauryl Sulfoacetate (SLSa)
  • 2 oz Cream of Tartar
  • 1 oz Arrowroot Powder

Wet Ingredients

  • 45 oz Glycerin
  • 73 oz Kokum Butter
  • 5 oz Blackberry & Magnolia Fragrance Oil by Crafters Choice
  • 15 oz Polysorbate 80


  • 1 Dash Neon Green Bath Bomb Colorant by Xen Bath and Beauty
  • 1 Dash Matte Yellow Oxide Colorant by Crafter’s Choice
  • 1 Dash Neon Bright Red Bath Bomb Colorant by Xen Bath and Beauty

Equipment Needed

  • Stand-up Mixer
  • Three Small Mixing Bowls
  • 2 Small Heart Tray Molds by Something Fabulous (available at Hobby Lobby)


  1. Before anything else put on a mask.
  2. With proper ventilation and while wearing your mask, mix together the dry ingredients until fully combined in a stand-up mixer bowl.
  3. In a separate bowl, melt your kokum butter. With the butter below 200 degrees F, add in the remaining wet ingredients.
  4. In a stand-up mixer, using your paddle or hook attachment, slowly add the wet ingredients to the dry ingredients and mix thoroughly until a pliable dough has formed.
  5. Divide the batch into three 5.5oz batches.
  6. Add your small dash of green colorant to one batch, a small dash of yellow oxide to the second batch, and the dash of neon red colorant to the third batch. Knead each batch until the colorants are fully combined with the dough.
  7. Fill your 2 tray molds with your three different doughs, making sure to press down firmly to avoid any wrinkles/gaps on the front of the bubble bar.
  8. Allow the bubble bars to dry overnight. Pop them in the freezer for an hour or so to harden before unmolding.
  9. Decorate with painted conversation heart sayings if you desire.

Like always, with bubble bars our first step is protection. And don’t get all cheeky with me, by protection I mean a face mask! Keep that SLSa out of those lungs.

Next, you’re going to pull out your stand-up mixer bowl and measure in all of your dry ingredients. Go ahead and set it up on your mixer, throw a towel over top to help contain the SLSa and mix it up until it’s fully combined.

In a separate bowl, measure out and melt your kokum butter. If you haven’t used kokum butter in your bath products before this is a perfect time to start! I’m a big fan of this less popular butter. It’s softer than cocoa but firmer than shea. Lots of recipes use a combination of those two to get this consistency. Why do that when you can just use kokum instead and get very similar benefits to the skin 🙂

Once the kokum butter has cooled to a temperature below 200 degrees Fahrenheit (you should be able to touch the outside of the jar with your bare hand without burning yourself), go ahead and add in the remaining wet ingredients. The fragrance oil I chose for this recipe is the Blackberry & Magnolia Fragrance Oil by Crafter’s Choice. I love this fruity and floral fragrance so much. Normally when you think of a fruity fragrance oil you’re imagining something along the lines of fruit loops or starburst. This fragrance has a nice soft fruit fragrance with notes of apple, magnolias, sugar and blackberries.

Tip: If you live in a more humid environment, start with a lesser amount of glycerin at first to prevent the mixture from getting too wet. You can always add more if it ends up being too dry.

Then, with your stand up mixer running, you’re going to slowly add your wet ingredients into your dry ingredients. Go ahead and mix that sucker up until it is completely combined. It should have a pliable texture to it without being sticky.

Once your mix is ready to go, you’ll be dividing it into three equal smaller batches – roughly 5.5oz per batch. Then you’re going to color each batch with just a dash of each of the following colorants:

And when I say a small dash, I mean a small dash. You want your hearts to have that pastel color to them, so less is more folks.

Once you have your colored batches ready to go, you’ll be making your bubble hearts by filling in two heart tray molds from Something Fabulous. I’ll go ahead and link up where you can get it online, or you should also be able to find it in your local Hobby Lobby if you have one nearby. When you are filling your molds, make sure you are pushing down firmly so you get a smooth finish on the front of your bubble hearts.

For the visual learners, here’s a quick video tutorial on the coloring and molding process.


Once you have molded these babies, go ahead and let them sit undisturbed overnight to dry. After that, I like to pop them in the freezer for an hour or so, so that they come out of the molds without a hitch.

Can’t make them now? Pin this for later!

9 thoughts on “DIY Conversation Bubble Hearts Bubble Bar Recipe”

    1. They won’t get as hard as a bath bomb, but they should be firm enough that they hold their shape. They should still be soft enough for you to smash in your hand so you can dissolve it easily under running hot water. If you want a firmer texture, reduce the amount of gylcerin you use in your next batch. Going forward, if you’re working on a batch and you feel like you’ve added in too much glycerin, you can sprinkle in some extra baking soda in small increments until you get the consistency you like. I hope that helps Corliss!

  1. Did u weigh your ingredients? because my scale in ounces only go’s up to 9 than go’s to 1 ounce so i can’t get 0.73 oz or 0.15 oz? i really want to make these. please help lol thank u 🙂

    1. Hi there! My scale can go down to 0.05oz increments. You’ll want a scale that can measure at very least to the tenth of an ounce for accurate measurements. LMK if you need help finding one! I can link you to the one I use. 🙂

      1. Hi Again,
        yes if u wouldn’t mind giving me the link that would be great thx.i live in canada not sure if that makes a diff.thx for your help. 🙂

  2. I recently purchased this mold and love it for my bath products! Ive made soap embeds and other bath products. Its great for V-day or all year round! Love your posts!!

  3. I apologize i hit post before i finished lol. Would Poly 20 work as well? And u can add just little cream tartar to make bubble bars little harder as well.

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