// Yeast
recipes.addShaped(<extratrees:misc:5>,
                [[null,<ore:listAllmushroom>,null],
                [<ore:listAllmushroom>,<ore:bread>,<ore:listAllmushroom>]]);

// Larger Yeast
recipes.addShaped(<extratrees:misc:6>,
                [[<ore:listAllmushroom>,<ore:bread>,<ore:listAllmushroom>],
                [null,<ore:listAllmushroom>,null]]);