Last day I was trying to caramelize sugar to make sugar cage. I start of by adding lots of sugar into small amount of water.After that started heating it. After few minutes it started to bubbling and suddenly it changed it colour to light brown and before I could do anything it turned into dark brown and burning smell came. Now the quetion is when do I stop heating it? I want it to taste sweet but it tasted bitter. Edit:Though I have accepted an answers I would like few more answer too.
It is perfectly normal for sugar to turn dark brown when making
caramel. If it turns even darker, it is because it has been burning too hot.
The final temperature should be around 234 F, so you want to get there gradually.
As for the color, many recipes call for
cream to make it smoother and tender, but only incorporate it after the crystals are fully dissolved and you're ready to take it off the burner.
I've seen a few youtube videos with just sugar and water for sugar cages...
Once you see the bubbling, it means the water has reached close to 100 C (assuming you're close to sea level) and once that water mostly evaporates the temperature will shoot up fast. Turn the heat lower when you see the bubbles and sail smooth from there. According to some recipes, stirring can cause crystallization. Once you've reached the desired color, dip the pan gently in cold water to stop the caramelization.
I read in an old cookbook about adding some lemon or lime juice to help. Haven't worked out the science, but trust her work.
Alton Brown Good Eats episode 'Puff the Magic Mallow' Season 11 Episode 12, he made marshmallow. However, he does talk about caramelizing sugar and temperatures (240 F per dnozay's answer). Actually, he does mention the acid as well, but it's to aid with the taste.