2 cups baking soda
1 cup citric acid
1 ml coffee fragrance oil
instant coffee grounds
In a large bowl mix baking soda, citric acid and fragrance oil. Mix in coffee grounds for desired look. Spray with alcohol until mixture has the consistency of wet stand and stays clumped together when squeezed - DO NOT OVER WET!
Sprinkle a bit of coffee grounds into your mold and then pack the mixture in tightly. Let dry over night before unmolding.