Open Soda Recipe

Open Cola

April 2009

WARING! Open Soda is a complex process that involves the mixing of dangerous chemicals. Please read all warning notes of all chemicals, oils, equipment, and processes listed on http://opensoda.org before starting. Only use glass and metal for mixing.

Software



Ingredients 2 liter batch metric

2 liter batch imperial

5 gal keg batch(note 2l x 10 is almost 5 gal) metric

5 gal keg batch(note 2l x 10 is almost 5 gal) imperial

Sugar

224g 8oz

2240g 80oz

For diet: Splenda 27.5g

1oz

275g 10oz

Citric Acid

.13g

.0045oz

1.3g .045oz

Phosphoric Acid

.7ml .02 fl oz

7ml .2 fl oz

Vodka .1ml

.003 fl oz

1ml .03 fl oz

Lemon Oil

.1ml

003 fl oz 1ml 03 fl oz Orange Oil

.1ml

003 fl oz 1ml 03 fl oz Grapefruit Oil .1ml

003 fl oz 1ml 03 fl oz Lime Oil

.1ml

003 fl oz 1ml 03 fl oz Cinnamon Oil .02ml .0007 fl oz

.2ml .007 fl oz

Gum Arabic 1/10tsp

??

1tsp ??

Sodium Citrate .5g

.018oz

5g .18oz

Sodium Benzoate .5g

.018oz 5g .18oz Carmel Coloring

.15tsp .74

1.5tsp 7.4

Meringue

Powder ??

1/16tsp

??

5/8tsp

Caffeine .15g

??

1.5g ??

Carbonation





Hardware

pipette

glass containers

cooking pots

scale(.1g accuracy is best)



drill with whisk attached

Directions



To start, boil water(1 cup for 2l, 10 cups for 5gal). Once the water is boiling, add in sugar and stir to dissolve. Decrease heat to medium so that solution is barley at a boil. Add both acids to the solution. Allow to cook for 30 minutes or until it reaches a light amber color.

While sugar is cooking, mix vodka and flavor oils in small glass container with pipette. Next, dissolve the gum arabic in a very small amount of water in a medium sized glass container. Your container should just barely be the size to allow your whisk attached to your drill to fit in. Contact with the sides is necessary. Pour your flavor oils into the water and gum arabic mixture and pour some back and forth to get every drop of oil. Mix the solution as high as you can for several minutes with the drill/whisk assembly. Then add the sodium citrate, sodium benzoate, and caffeine(optional) to the mixture and mix until fully dissolved.

When the sugar is done cooking, pour mixture in. Pour a bit of water into the mixing vessel to get any remaining mix out and pour into sugar. This concentrate is very potent and every last bit counts. Finally, add coloring to the resulting syrup and mix. Now just pour into final container(2l bottle or 5gal keg), fill up with water(don’t forget to pour water into the pot the syrup was in to get every last drop of syrup out), and carbonate using one of the carbonation methods.

Variants on other side

Variants



Variant 1 – Precise acid measurement vs acid mix

If you don’t have a scale precise enough to measure down to .1g, you can mix an acid mix 1st. In 2l bottle of water, add



100 g Sodium Citrate

100 g Sodium Benzoate

26 g Citric Acid

Then for a 5 gal keg, use 100ml of the mix. Each 100ml will contain 5g Sodium Citrate, 5g Sodium Citrate, and 1.3g Citric Acid. For 2l size, use 10ml of the mix. Warning, this mix crystallizes fast. This is why we don’t recommend this method. If you store this mix for any amount of time, you will have to heat up the water(with out losing any of it else you throw off your ratio) and shake VIGOROUSLY to get back into solution.



Variant 2 – Diet or regular

If you want to create diet version of any recipe, replace the sugar with Splenda. 275g for 5gal(one large bag) or 27.5g for a 2l.



Variant 3 – blender vs vodka

The vodka is used because oil is alcohol soluble and this vastly helps smooth out the flavor notes. If for some reason you do not wish to use the alcohol, you need to mix for a much longer time. If you don’t have a proper drill/whisk assembly, you can us a blender, but you need to add enough water to come up over the blades. Also, do not use plastic blender, the gum aribic will stick to it very badly. Use a glass blender and mix for several minutes.

June 27th 2009

