The best replacement for pancake batter is waffle batter.

The best alternatives to pancake batter are rated as following:
★★★★★  waffle batter
★★★★  crepe batter
★★  funnel cake batter
★  yorkshire pudding batter
★  waffle

Your alternative for pancake batter is not listed? Suggest!
Speaking about pancake batter, one probably shouldn't forget about bacon.

Other search terms related to pancake batter and their ratings are:
★★★★★ bacon
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pancake batter
waffle batter
crepe batter