diff --git a/src/com/dre/brewery/BIngredients.java b/src/com/dre/brewery/BIngredients.java
index cc9930a..0c4c9b9 100644
--- a/src/com/dre/brewery/BIngredients.java
+++ b/src/com/dre/brewery/BIngredients.java
@@ -247,6 +247,9 @@ public class BIngredients {
 		if (!recipe.needsDistilling() == distilled) {
 			return 0;
 		}
+		if (cookedTime <= 1) {
+			return 0;
+		}
 		int quality = 10 - (int) Math.round(((float) Math.abs(cookedTime - recipe.getCookingTime()) / recipe.allowedTimeDiff(recipe.getCookingTime())) * 10.0);
 
 		if (quality > 0) {
diff --git a/src/com/dre/brewery/BRecipe.java b/src/com/dre/brewery/BRecipe.java
index e5f8bb3..413d152 100644
--- a/src/com/dre/brewery/BRecipe.java
+++ b/src/com/dre/brewery/BRecipe.java
@@ -79,11 +79,11 @@ public class BRecipe {
 
 	// allowed deviation to the recipes cooking-time at the given difficulty
 	public int allowedTimeDiff(int time) {
+		if (time < 8) {
+			time = 8;
+		}
 		int allowedTimeDiff = Math.round((float) ((11.0 - difficulty) * (time / 10.0)));
 
-		while (allowedTimeDiff >= time) {
-			allowedTimeDiff -= 1;
-		}
 		if (allowedTimeDiff == 0) {
 			return 1;
 		}