You will find that it is both the total amount of carbs eaten at a meal and the type
of carb that affects your blood
sugar. Processed carbs like cereals, breads, cakes, potatoes, anythbing made with flour, sweet fruits, tend to have the biggest effect. Non-starchy veges and regular fat dairy should have a lesser effect. Best cheeses are the unprocessed ones, which have I think 1 g of carb/1 oz serve. But you can look it up.
Try eating different amounts of carbs/ meals.