To craft 4 of these windows at once you'll need (as of R26 in December 2015): * 1 Gingerbread Loaf made in the Cooking Station of Wheat (grown from Seeds found in Tallgrass) and Molasses (another christmas-holiday-find) * 1 Red Pigment made of Red Flowers from Ashenwood-trees in a Processor or found in Obsidian Treasure Chests * 2x Molasses found in Holiday Gift-boxes during christmas-holiday * 1 (block of) Glass made of Sand in a Forge Gingerbread Windows are fireproof (as yet).