The Food Composter is an electric Slimefun machine.

The Food Composter produces Organic Fertilizer. Organic Fertilizer is used in the Crop Growth Accelerator.
Place the correct items of a recipe in an input slot (Organic Food). After processing, the respective Organic Fertilizer will be placed in an output slot.
| Energy buffer | 256 J | |
| Tier 1 processing time | 30s | |
| Tier | Tier 1 | Tier 2 |
| Processing speed | 1x | 10x |
| Energy consumption | 16 J/s | 52 J/s |
Organic Food is produced in the Food Fabricator.
| Input | Output |
| Organic Food (Apple) | Organic Fertilizer (Apple) |
| Organic Food (Beetroot) | Organic Fertilizer (Beetroot) |
| Organic Food (Carrots) | Organic Fertilizer (Carrots) |
| Organic Food (Cocoa Beans) | Organic Fertilizer (Cocoa Beans) |
| Organic Food (Dried Kelp) | Organic Fertilizer (Dried Kelp) |
| Organic Food (Melon) | Organic Fertilizer (Melon) |
| Organic Food (Potatoes) | Organic Fertilizer (Potatoes) |
| Organic Food (Sweet Berries) | Organic Fertilizer (Sweet Berries) |
| Organic Food (Wheat) | Organic Fertilizer (Wheat) |
| Organic Food (Seeds) | Organic Fertilizer (Seeds) |