I DON'T THINK SO.....................
The grains that we grow as crops have wild precursors. It is possible that hunter gatherers collected these, ground them up, added water then baked them.
Actually, gathering of wild growing species of edible grains would have preceded intentional planting of selected varieties (agriculture). Beyond that, all you need to make dough is for the grains to get wet and the same wild yeasts that make sour dough would cause fermentation. Throw it on a fire (or invent a clay oven to bake it in) and you’ve got bread! Bonus: Let the grains soak and ferment in a vat of water and you’ll get a primitive sort of beer! Whether beer predated bread, or the other way around, would make a more interesting debate.