To make Crimson Stairs in Minecraft, you have to place 1x Crimson Planks on the first row, 2x Crimson Planks on the 2nd row, and 3x Crimson Planks on the crafting table’s third row shown in the picture below.Place the Crimson Planks in these exact positions to get 4x Crimson Stairs.
Opening the crafting menu of the crafting table will bring the 3×3 crafting grid.
2. Add 6 Crimson Planks to the Crafting Grid
The Minecraft recipe for Crimson Stairs requires you to place 1 Sandstone in the first box of the top row of the 3×3 crafting, 2 Crimson Planks in the first and second box of the second row, and 3 Crimson Planks to fully cover the third row.
You will know that you are using the correct recipe as the crafting menu will show you 4 pieces of Crimson Stairs on the resulting side.
3. Move the Crimson Stairs to your inventory
Moving the Crimson Stairs to your inventory allows you to perform the crafting process, so you have now made Crimson Stairs in Minecraft.