The Millstone is a critical crafting station in Windrose that opens up an entire tier of processing recipes, most notably Gunpowder for your firearms. You can't build one until you've pushed into the Foothills biome and completed a specific chain of main quests, so many players hit a wall, wondering why the recipe never appears. Here's exactly how the unlock works and what you can do once the Millstone is up and running.
Quick answer: Travel to the Foothills, pick up Corn from one of the islands there, and the Millstone Parts recipe will automatically unlock at your Workbench. Craft Millstone Parts for 15 Stone, then place the Millstone in Build Mode using 1 Millstone Parts + 15 Wood.
Quest prerequisites before you can reach the Foothills
The Millstone recipe is gated behind story progression. You won't have access to the Foothills — or the resources found there — until you've cleared several main quests and defeated the first boss. The chain looks like this:
Step 1: Complete the main quests Rescuing the Crew and I Need a Bigger Boat. These quests walk you through early-game survival, base building, and your first ship upgrade.
Step 2: Kill Thomas Richards and finish the quest Revenge is Best Served Cold. Defeating this boss unlocks the Discover page for the Foothills biome and a large batch of new resource types, including Foothills Iron Ore.
Step 3: Sail to the Foothills. Once you arrive, explore the islands until you find Corn growing naturally. Simply picking it up triggers the unlock for Millstone Parts at your Workbench.
Crafting and placing the Millstone
Once Corn has been discovered, the crafting process is straightforward but involves two separate steps — one at the Workbench and one in Build Mode.
| Step | Where | Recipe |
|---|---|---|
| Craft Millstone Parts | Workbench | 15 Stone |
| Place Millstone | Build Mode | 1 Millstone Parts + 15 Wood |
You may also need the Sawhorse workbench upgrade available by this point in your progression. Make sure your Workbench is fully upgraded for Tier 2 crafting before attempting to build the Millstone Parts.
What the Millstone can craft
The Millstone is a grinding station. You load raw materials in and get processed goods out. Four recipes are available at the Millstone:
| Output | Input | Notes |
|---|---|---|
| Gunpowder | 10 Sulfur + 20 Ash | Required for all firearms alongside bullets |
| Ash (from Charcoal) | 2 Charcoal | Produces 6 Ash; less efficient than Charcoal Kiln byproduct |
| Cornmeal | Corn | Used in food recipes |
| Bone Meal | Bones | Used in various crafting recipes |
Gunpowder is by far the most important product here. Without it, your Pistols and Blunderbusses won't fire even if you have a full stack of Stone Bullets loaded. Gunpowder fills the dedicated Ammo slot in your inventory alongside your bullet type.
Where to find Sulfur and Ash
Sulfur deposits appear in both the Coastal Jungle and Foothills biomes, but you can only mine them once you have an Iron Pickaxe. The deposits come in two visual forms — one resembles ordinary stone with subtle yellow marbling that's easy to walk past, while the other is a clumpy, gravel-like boulder covered in obvious yellow coloring. Get close and inspect any suspicious rocks if you're having trouble spotting them.
Ash is much simpler to stockpile. Every time you burn Wood in the Charcoal Kiln to produce Charcoal, Ash drops as a byproduct. You likely already have a healthy supply sitting in storage. The Millstone can also convert 2 Charcoal into 6 Ash, but this is generally wasteful since Charcoal is needed for smelting ingots. Stick to the Kiln byproduct method whenever possible.
Alternative ways to get Gunpowder without the Millstone
If you need Gunpowder before your Millstone is operational, a few loot sources exist, though none are reliable enough to replace crafting long-term:
| Source | Details |
|---|---|
| Cave and ruin chests | Found across all three islands; Gunpowder drop rate is low |
| Blackbeard's Pirate Camps | Chests and sacks inside camps during the Rescuing Your Crew quest |
| Enemy pirates | Sailors and higher-level human enemies sometimes drop Gunpowder on death |
These sources can tide you over during the early Foothills transition, but building a Millstone and farming Sulfur is the only sustainable path to keeping your guns loaded.
Using Gunpowder with firearms
Windrose treats Gunpowder as a separate ammo component. You need both bullets (like Stone Bullets) and Gunpowder equipped to fire any gun. When you pick up or craft Gunpowder, it automatically slots into the Ammo section of your inventory next to your bullet stack. Turning on auto-refill in your inventory settings makes reloading during combat significantly smoother — without it, you'll need to manually manage both ammo types mid-fight.
The Millstone sits at a pivotal point in Windrose's progression curve. It marks your transition from melee-only combat into ranged firepower, and it unlocks food processing recipes that become important as you push deeper into harder content. Prioritize finding Corn as soon as you reach the Foothills, get your Iron Pickaxe forged, and start stockpiling Sulfur early. Your pistol will thank you.