You have to look at the carbs content on the packet, then weigh your portion. Then you can work out the carbs you eat.
Some sweet tasing foods may have sweeteners and not be as sugary as you think, also, if you eat sugary stuff with fats it slows the absorption down, as does eating it with lots of non sugary food.
I bet if you weigh some sugar and calculate the carbs in it then eat it, and then weigh some wholemeal bread to exactly the same carb content and eat it, the sugar will hit your bloodstream faster and give a higher peak reading than the bread.
I am being theoretical here, don't actually eat the sugar!
This is why you will read so many times " eat to your meter" and "test around your food".
You have to weigh it, calculate the carbs content and then see how it affects your BGs.
If you can eat some sugary food and not get high Bgs after 1 and 2 hours then that is OK for you, but might not be for others.
H
You might have discovered a low carb sugar of course, in which case tell us what it is and we will all have some