How to assemble a DIY double boiler

When selecting a bowl for your double boiler setup, opt for one made from heat-resistant glass, ceramic, or metal. If the walls of your bowl are too thick, heat may not transfer effectively, so avoid heavy stoneware. Metal mixing bowls are an excellent option due to their thinner walls and durability. Additionally, PYREX (in all caps, indicating it is likely made from heat-resistant borosilicate glass) is also a fantastic choice. Steer clear of any plastic, even if it’s labeled as microwave-safe, as it could melt and damage your saucepan (and ruin your recipe).
It's also crucial to think about the size of your bowl. It should be large enough to completely cover the top of your pot, but not so oversized that it feels unstable or easily slides around. You want it to sit securely without the risk of touching the hot water, which would lead to direct heat transfer. Consider using a heat-resistant glove or silicone tongs to help keep the bowl steady while you whisk.
To set up your double boiler, add a small amount of water to the saucepan and place the bowl on top. Ensure that the bowl does not touch the water, as excess heat could scorch your delicate ingredients. At this stage, your DIY double boiler is ready to assist in making an olive oil-based dairy-free lemon curd, melting white chocolate for a mirror glaze, or preparing a garlicky béchamel as a base for your favorite silky fondue.
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