Slab to Block is a simple data pack that adds recipes to convert your slabs back into whole blocks!

For most slabs, this recipe is two slabs stacked on top of each other. For the small handful that already have a recipe for that configuration, you'll instead place the slabs diagonally in the crafting window. Both recipes fit easily within the inventory crafting space.

Slabs that use diagonal crafting
Sandstone
Red sandstone
Stone bricks
Quartz
Purpur

Recipes are also properly unlocked for the recipe book the first time you have slabs in your inventory.

To install
Place the downloaded .zip into the datapacks folder of your world folder.
Do not unzip the file. Just copy it in.