- This project and these instructions have been written for someone who has experience making soap and knows the potential dangers due to working with sodium hydroxide. It will not outline safety methods of working with dangerous chemicals, it is simply a soap recipe for advanced soapmakers.
- Put on your protective gear. This is very important since you will be working with an extremely caustic base that can and will burn you if you touch it. Noxious fumes are also released from the exothermic reaction that occurs when you mix the sodium hydroxide with water.
- Wear a face mask or leave the vicinity quickly after stirring the sodium hydroxide into the water. If you get any lye on your skin just wash it off quickly with copious amounts of cool water
- Pour beer into a pot and put over a low heat stirring occasionally. Leave cooking for about 30 minutes.
- After the beer is flat, pour into an ice cube tray and place in freezer. Let the beer harden.
- Weigh beer cubes and place in a large container. If beer does not reach the weight of 10.64 ounces, substitute water until this weight is reached.
- Weigh lye flakes and place in separate container.
- Very carefully, pour lye into water/beer and stir until lye is dissolved.
- Weigh oils and butter and place in microwave-safe glass bowl. Microwave on high until butters are melted.
- Some of the harder oils as well as the shea butter may not melt as quickly. You may have to start microwaving those before you add your other oils.
- Prepare your white colorant by taking about 2 tablespoons of oils and placing in a beaker. Add the Crafters Choice Matte White Pigment Powder-for Oil and stir well. The Mini Mixer works great for this.
- You will want the oils and lye water to be close to the same temperature when you pour them. At around 100°F, you can start soaping.
- Place your blender in the oils and tap it on the bottom of the bowl to "burp" it and release any air bubbles.
- Pour the lye water over the shaft of the stick blender. Carefully blend your oils and lye water until the mixture comes to a very light trace.
- Slowly, add your fragrance oil while stirring the soap with a spatula.
- NOTE: The Oatmeal Stout fragrance oil causes the soap to turn brown. If you want the top of your soap to be very white, then wait until after you pour some soap into another cup to add the fragrance oil.
- In a separate measuring cup, pour about 1 cup of traced soap. Add the Matte White Pigment Powder for Oil to the reserved soap in the measuring cup. Use the stick blender to incorporate, then use the spatula to make sure the color is completely stirred in.
- Pour into your mold the soap that is not colored and tap on the counter to release any air bubbles.
- Carefully pour the white soap along the top of your loaf. You can now play with texture on the top, making it look like whipped cream, if you like. Sprinkle the Oat Scrub along the middle of the soap.
- Carefully insulate the sides of the loaf with a towel. Allow to sit overnight, uncovered.
- The next morning, carefully unmold the loaf and slice into 8 one-inch slices. Allow the bars to sit on a cooling rack for 4-6 weeks to cure fully.