To find the unit rate of muffins per cup of almonds, divide the number of muffins by the number of cups of almonds.
Unit rate = Number of muffins / Number of cups of almonds
Unit rate = 30 muffins / 4 cups of almond
Unit rate = 7.5 muffins/cup
Therefore, Manny is using 7.5 muffins per cup of almonds.