Twelve gluten-free banana muffins built on 285 g of very ripe banana and 55 g applesauce, with collagen peptides for protein. The batter rests 8 minutes before the melted fat goes in — that rest is what keeps a gluten-free, collagen-containing crumb from turning rubbery.
Hold the melted fat back until after the 8-minute rest — the flour and collagen need that time to absorb moisture first.
The 8-minute rest lets the gluten-free flour and the collagen hydrate while the batter is still lean — fat added earlier coats the starch and blocks that. Tempering the melted fat with 50–60 g of batter first means it emulsifies in a handful of strokes instead of needing the vigorous mixing that would toughen the crumb. The rest is capped at 8 minutes because the 10 g lemon juice has already started reacting with the baking soda.