This will make your bathroom feel like your own personal spa.

By Real Simple
Updated June 15, 2018

A safety note: Lye is strong—so proceed carefully. For this DIY project, you’ll want to wear long sleeves, pants, closed-toe shoes, safety googles, and gloves. Make sure you’re working in a well-ventilated room and that no children or pets are present.

Step One: Prep the Lye

  • Make sure the scale is set to ounces. In a large tempered glass measuring cup, weigh out 10.9 ounces of room temperature distilled water.
  • In a separate large tempered glass measuring cup, weigh out 4.7 ounces of pure sodium hydroxide lye flakes.
  • Slowly add the lye to the water and gently stir until the lye has fully dissolved. Place aside until it cools to 110°-130° F. (If you need to leave the room, place the container in a safe space with a clear label that says ‘poison’.) Once it cools, add 2 teaspoons of Sodium Lactate to the lye water and stir gently.

Step Two: Prep Oils

Fully melt the entire bag of Lots of Lather Quick Mix from Bramble Berry in the microwave (leave cap on) until there are no chunks or cloudiness. Give the bag a good shake to mix. Weigh out 33 ounces into a large glass bowl. Set aside until it reaches 110°-130° F.

Step Three: Make Soap

Slowly add the lye solution to the bowl of melted Lots of Lather Quick Mix. Pulse the stick blender on and off to mix. Continue to pulse and stir for about 1 minute, until the texture of the mix is of thin pudding.

Step Four: Split the Batch and Color

Pour about half of the soap into a separate container (it’s okay to eyeball it). Add ½ teaspoon of Bramble Berry Rose Pearl Mica to one container, and stick blend it until fully mixed.

Step Five: Add Fragrance Oil

Add the Bramble Berry Wild Rose Fragrance Oil to each container of soap (dividing it equally) and mix in by hand.

Step Six: Swirl Soap

Pour the white soap into the pink soap in different areas and from various heights. Use a spoon or spatula to swirl.

Step Seven: Pour Soap Into Mold

Pour the batter into the mold. Use a spoon or spatula to create texture on the top of the soap. If the soap is not holding its shape, allow it to sit in the mold for 2 to 3 minutes and then try again.

Step Eight: Decorate Top and Let Set

  • Sprinkle pink rose petals onto the top of the soap. Place the soap in a room-temperature area where it won’t be disturbed. Let soap harden in mold for 2 to 3 days.
  • Soap will be ready to use in 4 to 6 weeks. After 3 to 4 days, take soap gently out of the mold by pulling silicone molds away from the sides of the soap. Cut with a non-serrated knife. Lay the soap on its side for a cleaner cut (as to not drag down roses).
  • Let bars sit to dry out and cure for 4 to 6 weeks to create a firm, long-lasting bar.

To buy: Full kit, $35,