The ability to produce and control fire is a momentous technological development and one that is unique to humans. The ways in which early pyrotechnology evolved and varied amongst prehistoric foragers is, however, poorly resolved. The main objective of the MicroAsh project is to reconstruct Middle and Later Stone Age (MSA and LSA) pyrotechnology variability by focusing on three closed-space rockshelters located in the Kasitu Valley (Malawi), which show exceptional preservation of organic materials. My pilot studies have shown that ashes constitute the main sedimentary components at the selected sites, though individual combustion features are invisible based solely on field observations. Human remains have been retrieved from all three sites, with the apparent use of fire for ritual interment practices during the LSA. MicroAsh will apply high resolution geoarchaeological techniques (micromorphology, μFTIR, GIS), to study (1) site formation processes, (2) the relationship between fire use and paleoenvironment, (3) variability in the use of fire for ritual and subsistence through time, and (4) site-use intensity. The project will create, and make openly available, experimental datasets on characterization of ashes from varied local botanical resources that are of use to research in similar archaeological contexts in Africa. The largely unexplored potential of using human-made residues will contribute to our understanding of the transition from MSA to LSA foraging strategies.