Every Recipe in Better Crafting Recipes, and What Each One Costs
Better Crafting Recipes adds no items of its own. It adds ten crafting recipes for vanilla items that normally cannot be crafted at all, so a 
Saddle, an 
Elytra or a 
Trident becomes something you build rather than something you hope to find. Every recipe below is a shaped recipe on a normal crafting table.
The cheap ones you will want first
A Saddle takes five 
Leather, one 
String and two 
Iron Ingot in a pattern that fills the top row with leather, puts string in the middle and lays two ingots along the bottom. It is the single most useful recipe here, because the vanilla game offers no way to make one and horse travel otherwise waits on chest luck.
A 
Name Tag is smaller still: one 
Paper, one 
Ink Sac, one Leather and one String in a compact two-row shape. Vanilla gates name tags behind fishing and trading, and this turns them into a bench item.
Diamond Horse Armor is a ring of six 
Diamond around a single Leather. The cost is real but it is finite, which is the point.
Doubling what the world gives you
Three recipes take something you already own and hand back two.
Crying Obsidian is made from four 
Obsidian, four 
Ghast Tear and one Crying Obsidian at the centre, and yields two. It only works if you already have a block to seed it, so treat it as duplication rather than creation.
Wet Sponge follows the same idea: eight 
Prismarine Crystals around one Wet Sponge returns two. One monument trip becomes a renewable supply.
Spore Blossom wraps a Spore Blossom in 
Vines, 
Flowering Azalea Leaves and a 
Moss Block, plus a 
Big Dripleaf, and gives two back.
A 
Shulker Box is the odd one out in this group: eight planks around a single 
Eye of Ender. No shulker needed, and no end trip.
The expensive three
These are deliberately late-game and priced that way.
An Elytra wants a 
Diamond Chestplate at the centre, two 
Phantom Membrane, two 
End Rod, a 
Dragon Head and a 
Nether Star. That is one dragon and one wither before you start.
A Trident takes a 
Conduit in the middle with 
Prismarine Shard, 
Nautilus Shell and a 
Heart of the Sea around it, so it costs a conduit's worth of ocean work instead of drowned farming.
A 
Totem of Undying is built from a 
Golden Apple at the centre, two 
Echo Shard, two 
Block of Emerald and two 
Block of Gold. Echo shards mean an ancient city, so this is a raid alternative rather than a shortcut.
The two builds are not the same list
This is worth checking before you plan around a recipe. The 1.21.1 build has ten and the 1.20.1 build has eight, but they are not simply eight of the same ten — each version carries recipes the other does not.
Only on 1.21.1: Diamond Horse Armor, Shulker Box, Wet Sponge, Name Tag and Spore Blossom.
Only on 1.20.1, and none of them came forward: an 
Enchanted Golden Apple from a Golden Apple, an 
Apple and Block of Gold; a 
Dragon Egg that doubles one you already have using Obsidian and Crying Obsidian; and nine 
Magma Block from 
Netherrack and a 
Lava Bucket.
So a world on 1.20.1 can duplicate the dragon egg and craft notch apples, and a world on 1.21.1 cannot. The five recipes shared by both are the saddle, elytra, trident, totem and crying obsidian.