Mix okonomiyaki flour with water to make a batter.
Chop the cabbage finely.
Cut the squid and bacon into bite-sized pieces.
Mix the cabbage, squid, and bacon into the batter.
Heat oil in a pan and spread the batter into a round shape.
Cook on medium-low heat until both sides are golden brown.
Top the finished okonomiyaki with okonomiyaki sauce, mayonnaise, and dried bonito flakes.