Method 1: Crafting Table
Place 3 Mud Bricks in a Crafting Table to make 6 Mud Brick Slabs.
6 How to Make a Mud Brick Slab in Minecraft
Use this simple recipe to make a Mud Brick Slab in Minecraft. You can see the exact ingredients, recipe layout, and workstation below.
Mud Brick Slab recipe
Follow the recipe below. The pattern must use the correct slots when the recipe is shaped.
6 
Method 2: Stonecutter
Use 1 Mud Bricks in a Stonecutter to make 2 Mud Brick Slabs.
2 About this Minecraft recipe
This page shows the vanilla recipe for Mud Brick 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.