Acacia Slabs are half-versions of their respective blocks. And it can occupy either the top half or the bottom half of a block, or both.
To make Acacia Slab, you’ll need Acacia Wood Log and Acacia Wood Planks. Please follow the following steps to make an Acacia Slab.
Acacia Wood Log
In order to make an Acacia Slab, the basic item you will need is Acacia wood block. Find an acacia tree and use your iron axe to chop down a piece of acacia log. You can find acacia trees in the savanna biomes.
Acacia Wood Planks
After that you will need to use the crafting table to craft acacia wood planks. Head towards the crafting table and open up 3*3 crafting grid to add acacia wood block in the center or any cell of the grid. You will get four acacia wooden planks from one acacia log in the right-side box of the crafting table. Add these planks into your inventory.
Now you can craft an Acacia Slab using the crafting table. Add three acacia planks in any row of the crafting grid as shown in the image below. You will get six Acacia slabs in the right-side box of the crafting table. Add these slabs in your “ready to use” stock.