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Lamello Top biscuit joiner with blade extended. Edges of 16mm Medium-density fibreboard with a #0 biscuit, set up to make a right angle joint. A biscuit joiner (or sometimes plate joiner) is a woodworking tool used to join two pieces of wood together. A biscuit joiner uses a small circular saw blade to cut a crescent-shaped hole (called the mouth) in the opposite edges of two pieces of wood or wood composite panels. An oval-shaped, highly dried and compressed wooden biscuit (beech or particle wood) is covered with glue, or glue is applied in the slot.
1 Keep your butter and liquids cold: Mixing biscuit dough by hand helps control the size of the butter pieces and reduces the risk of over-mixing. 2  If you're working in a very warm environment or have hot hands, consider using a food processor to cut-in the butter. 3  Again, be careful not to over-mix.urn out the dough onto a lightly floured work surface. To create a cohesive dough, press and fold it with your fingers, rather than squeezing or kneading it. This controls gluten formation, which can make your biscuits tough rather than light and fluffy.