Flavoring composition and process for brewing malt beverages
An improved flavoring composition and process for brewing malt beverages is disclosed. In one embodiment of the invention, the flavoring composition is formed from a high solids percent, room temperature stable, partially aqueous composition of a potassium salt of iso-α-acids. Such composition may be added to the wort kettle or else used as a post-fermentation additive, preferably after dilution with demineralized water. In another embodiment, the flavoring composition comprises a mixture containing reduced (rho-) iso-α-acids in alkali metal salts form, β-acids and hop oil. This latter composition is useful as a substitute for normal kettle extract, hops or hop pellets, allowing easy preparation of beer that resists formation of unpleasant, “skunk” flavors but has otherwise similar flavor and physical properties.
1. A process for forming a stable, high solids content, partially aqueous composition containing reduced (rho-) iso-α-acids, comprising the steps, in sequence, of (A) heating a mixture of reduced (rho-) iso-α-acids in their acidic resinous form to fluid state, and (B) adding a concentrated aqueous alkali metal hydroxide solution to said heated mixture, with stirring, to form a concentrated, single phase aqueous solution containing a mixture of alkali metal salts of said reduced (rho-) iso-alpha-acids.
2. The process of claim 1 , wherein said concentrated aqueous alkali hydroxide solution is added to said heated mixture of reduced (rho-) iso-α-acids stepwise until a substantially neutral or slightly alkaline pH is attained.
3. The process of claim 1 , further comprising the step (C) of cooling said resulting, concentrated, single phase aqueous solution of alkali metal salts of reduced (rho-) iso-α-acids of step (B) to room temperature.
4. The process of claim 1 , wherein said concentrated alkali metal hydroxide solution comprises potassium hydroxide.
5. The process of claim 4 , wherein said potassium hydroxide comprises a saturated aqueous solution containing about 45 weight percent potassium hydroxide.
6. The process of claim 1 , wherein said concentrated, single phase solution contains about 55 to about 85 weight percent of alkali metal salt of said reduced (rho-) iso-alpha acids.