Method 1: Crafting Table
Place 3 Blackstone in a Crafting Table to make 6 Blackstone Slabs.
6 Ingredients
- 3 Blackstone
Output: 6 Blackstone Slabs
How to Make a Blackstone Slab in Minecraft
Use this simple recipe to make a Blackstone Slab in Minecraft. You can see the exact ingredients, recipe layout, and workstation below.
Blackstone Slab recipe
Follow the recipe below. The pattern must use the correct slots when the recipe is shaped.
6 
Method 2: Stonecutter
Use 1 Blackstone in a Stonecutter to make 2 Blackstone Slabs.
2 Ingredients
- 1 Blackstone
Output: 2 Blackstone Slabs
About this Minecraft recipe
This page shows the vanilla recipe for Blackstone Slab. It includes the exact ingredients, recipe layout, required workstation, and amount produced.
The data comes from Minecraft Java 26.2. Recipes can change in later game versions, so check the version you play before crafting.