What are the steps to creating synthetic glucose?
A relatively simple process is described by Kobayashi et. al where they use cellulose, a structural component of plants, which is ball milled, mixed with activated carbons and HCl and hydrolysed to produce glucose in high yield (88%).

It requires only easily available ingredients and the ability to heat (and preferably stir) to 453K. Reference is given below.

High-Yielding One-Pot Synthesis of Glucose from Cellulose Using Simple Activated Carbons and Trace Hydrochloric Acid
Hirokazu Kobayashi, Mizuho Yabushita, Tasuku Komanoya, Kenji Hara, Ichiro Fujita, and Atsushi Fukuoka
ACS Catalysis 2013 3 (4), 581-587
DOI: 10.1021/cs300845f