Gelatin decides how hard the bear pushes back. Thirty grams against 150 g of juice is one part in five, which is a lot by any home standard and roughly double what most juice-gummy recipes ask for. Take it to one in four and the texture goes squeaky. At one in seven you get a bear that holds its ears on the shelf and then collapses the moment you bite it.
Sugar does two jobs, and sweetness is the smaller one. The 90 g of granulated sugar and 45 g of glucose syrup hold water inside the gel so the bear stays bendy rather than drying to a chip. Glucose has a second use: it stops the sugar turning grainy while the bears sit out. Use 135 g of plain sugar instead and fine white crystals will push through the surface by day two.
Juice is the part you can change freely, so long as the weight stays at 150 g. Grape gives a purple you cannot buy in a bottle of colouring. Tart cherry lands closer to the flavour most people mean when they say gummy bear. Protease fruits are the exception, and they are not negotiable: mango, pineapple, kiwi, papaya, guava, fig. Enzymes in those fruits cut gelatin apart, and a batch made with them sits in the mould as a puddle the next morning.


