Answer:
No. You have enough sugar, but not enough flour, so you can't follow the recipe.

Both Items Needed

The question about whether you have enough ingredients has two parts:

You need at least 4 cups of flour    AND    You need at least 2 cups of sugar

Since you do not have enough flour, you don't have enough ingredients. (:<)

Question 2:
What if you had 9 cups of flour and 1 cup of sugar. Now could you follow the recipe?