I have an old recipe from my Nonni which contains eggs, sugar, milk, butter, yeast, etc. Sometimes it rises & sometimes it doesn't. It is a sweet bread and I thought the recipe called for 1 cup of sugar and the bread worked for that recipe but it wasn't as sweet as Nonn's so when I checked the recipe again ( I had reduced the recipe because my mixer couldn't handle the full recipe) I had reduced the sugar too much and it was supposed to be 2 cups of sugar. That time though the bread would not rise at all. Does the amount of sugar and the amount of yeast affect the recipe. I used 3 packets of dry yeast with 1 cup of sugar. I didn't increase the yeast when I made the second recipe with 2 cups of sugar. Should I have increased the amount of yeast when I increased the amount of sugar?