With the layout of the boards determined, we'll turn our attention to the tongue and groove joints that will hold the slab-style cabinet doors together.
Install a stacked dado blade set on your table saw, set to 1/4" width. Adjust the depth of cut to 1/2", and set the fence 1/4" away from the right side of the dado blade. Place the face of the first board to receive a groove flat against the fence (with the edge flat on the table) and run the board through the dado blade. Then, turn the board around and run it through the blade again, this time leading with the opposite end of the board. Cutting the groove from each end will ensure that the groove is perfectly centered.
Repeat this step for each of the remaining grooves.


