Process for the preparation of heat treated cereal based food products
The present invention relates to a new process to prepare heat treated cereal based food products enriched in certain flavours and to the heat treated cereal based food products obtainable by this process. Additionally, the present invention relates to a process to generate a pre-reacted fraction and to the pre-reacted fraction itself. Such pre-reacted fraction can be used in the process of the invention to prepare heat treated cereal based food products.
1. A process for preparation of a heat-treated cereal-based food product, the process comprising:
forming a wet mixture of water, bulking agent, dairy protein, reducing sugar, and fat;
subjecting the wet mixture to a temperature between 100° C. and 150° C. under a pressure between 2 bars and 7 bars for a time between 5 minutes and 20 minutes to produce a pre-reacted fraction;
combining the pre-reacted fraction with a cereal-based ingredient to form a cereal-based food preparation, wherein the pre-reacted fraction is added to the cereal-based ingredient in an amount between 3 and 30 dry w/w of the cereal-based food preparation; and
subjecting the cereal based food preparation to heat treatment and drying to form the heat-treated cereal-based food product.
2. The process according to claim 1 , wherein the forming of the wet mixture is performed at a temperature between 60° C. and 80° C.
3. The process according to claim 1 , wherein the wet mixture is pumped at a temperature between 40° C. and 80° C. into an equipment where the combining is performed.
4. The process according to claim 1 , wherein the wet mixture has a total solid content between 65% and 90% dry w/w of the wet mixture.
5. The process according to claim 1 , wherein the pH of the wet mixture is between 6 and 8.
6. The process according to claim 1 , wherein the pre-reacted fraction is cooled at a temperature between 50° C. and 80° C. before the combining takes place.
7. The process according to claim 1 , wherein the wet mixture comprises the bulking agent in an amount of between 40% and 70% dry w/w of the wet mixture.
8. The process according to claim 1 , wherein the wet mixture comprises the dairy protein in an amount of between 5% and 25% dry w/w of the wet mixture.
9. The process according to claim 1 , wherein the wet mixture comprises the fat in an amount of between 10% and 25% dry w/w of the wet mixture.
10. The process according to claim 1 , wherein the wet mixture comprises the water in an amount of between 10% and 30% w/w of the wet mixture.
11. The process according to claim 1 , wherein the step of subjecting the cereal based food preparation to heat treatment and the step of drying to form the heat-treated cereal-based food product are carried out simultaneously.
12. The process according to claim 1 , wherein the heat-treated cereal-based food product comprises odorants comprising 2-acetyl-1-thiazole and 2-acetyl-1-thiazoline, and the contents of 2-acetyl-1-thiazoline and 2-acetyl-1-thiazole in the heat-treated cereal-based food product are increased compared to another product made by a conventional approach without the pre-reacted fraction.
13. The process according to claim 1 , wherein the heat-treated cereal-based product comprises odorants comprising 2-acetyl-1-thiazole, 4-vinylguaiacol, 2-acetyl-1-thiazoline, and 3-methylbutanal, wherein
a first ratio between a concentrations of 2-acetyl-1-thiazole to a concentration of 4-vinylguaiacol is equal or higher than 0.02 and a second ratio between a concentration of 2-acetyl-1-thiazoline to the concentration of 4-vinylguaiacol is equal or higher than 0.02; and/or
a third ratio between the concentration of 2-acetyl-1-thiazole to a concentration 3-methylbutanal is equal or higher than 0.035 and a fourth ratio between the concentration of 2-acetyl-1-thiazoline to the concentration of 3-methylbutanal is equal or higher than 0.040.
14. The process of claim 1 , wherein the subjecting of the wet mixture to the temperature between 100° C. and 150° C. is performed under a pressure between 3 bars and 6 bars.
15. The process of claim 1 , wherein the pre-reacted fraction is added to the cereal-based ingredient in an amount between 5 and 20 dry w/w of the cereal-based food preparation.
16. The process according to claim 1 , wherein the wet mixture has a total solid content between 70% and 90% dry w/w of the wet mixture.
17. The process according to claim 1 , wherein the pH of the wet mixture is between 6 and 7.
18. The process according to claim 1 , wherein the subjecting of the cereal-based food preparation to the heat treatment and the drying to form the heat-treated cereal-based food product are carried out simultaneously via roller drying, wafer or biscuit baking toasting treatments.