White chocolate ganache won't set

White chocolate does not have starch, so it does not thicken the ganache, unlike dark chocolate.

The proper proportion for white chocolate ganache is 45 to 60 ml of cream to 12 ounces of chocolate. You used 240 ml, which made it too runny. Use less cream and you will get a good consistency.

In addition to using too much cream, part of the problem is also that you're using chocolate chips for any purpose other than... chips.

Chocolate chips are specifically made to be somewhat heat-resistant and have less cocoa butter than quality couverture or even compound or baker's chocolate, which means that any melted-chocolate product (including ganache) that you try to make with them will end up being grainy and not set properly.

They're cheap for a reason. They're fine to use in muffins and cookies and ice cream and anything else that is actually going to have chocolate chips, but they should be viewed and treated for what they really are - packaged candy/confection products like sprinkles or canned frosting - rather than as pure chocolate for use in ganaches or enrobing or even as an appropriate substitute.

You can kind of get away with cheaper bittersweet or dark chocolate, but since white chocolate already has a ton of milk and very little (if any) cocoa solids, you really notice the difference in quality primarily due to cocoa butter content, and the cheap stuff is hopelessly runny and usually also cloyingly sweet.

I personally would not bother attempting the recipe again, even using only 20% of the cream, without decent-quality chocolate. Even if it "sets" properly, it's not going to have the texture you want with chips. It's not really that expensive; I can get a huge brick of Callebaut white chocolate here for under $20.

I tried the first suggestion, 45-60 ml of heavy cream with 12 oz. of Nestle's White Chocolate chips and it worked great.

Put chips in a glass bowl. Pour in cream. Stir to coat. Set microwave on 2:30 (two minutes thirty seconds) at half power. Micro :30 stir with a metal spoon. Micro another :30 and stir. *Repeat until out of time n micro. Stir with whisk until smooth.

Let ganache set for twenty minutes or so then use as desired. I poured mine over a strawberry bundt and it set up shiny and delish.

• I also added 1.5 tablespoons of Drambuie half way through melting process.

White chocolate with a decent amount of cocoa solids should use a 4:1 ratio, that is four parts white chocolate to one part heavy cream with a fat content of 35%. This is for a good coat of ganache similar to dark chocolate ganache. I like to make a whipped cream ganache as it goes further and is not cloyingly sweet. You shouldn't need to add corn syrup or icing sugar. What is very nice is to get freeze-dried strawberry, raspberry or other fruit powders. Then you can add flavour and colour to the white ganache. (Try health food shops or buy online). If using a white or fruit ganache for an occasion, I would suggest that you make a small sample batch to get the consistency right first. Some people can get away with a 3.5:1 ratio for example, it can depend on the chocolate.

It does help to add powdered sugar, but it still does not set enough. I had the same problem with my white choc ganache, I thought I would make it using a dark chocolate recipe and it came out too runny, whipping it didn't help, adding powdered sugar helped a lot, but still not good enough. Left in fridge overnight and added double the amount I had of melted White chocolate in the morning. That's the only way that really helped thicken it.

I've just tried to make white chocolate ganache, following a recipe which usually uses dark chocolate with butter as well as cream. It didn't set the same at all but after I let it sit in the fridge for a little white it thickened up enough to spread across the top and sides of the cake just fine.

Perhaps you may also try adding some corn syrup, about two tablespoons.

You need to add more white chocolate chips into the ganache, and heat it. You need to stir it during the whole process and continuously repeat it till it is no runnier.