Tick what's in the cupboard. The list re-sorts into what you can make now, what's one ingredient away, and the substitute that gets you there — every bake with its formula in grams.
Salt and water are assumed. 29 bakes are matched, from two-ingredient meringues to full loaves.
Pick a few ingredients above and this list rearranges itself: what you can bake right now, what you're one ingredient away from, and which substitute closes the gap.
Shortbread. Use the classic 3:2:1 formula by weight — 300 g flour, 200 g butter, 100 g sugar — pressed into a tin and baked at 160°C / 325°F for 35–40 minutes. Add eggs and baking powder and the same cupboard makes sugar cookies, pound cake, and scones.
Shortbread, Irish soda bread, drop biscuits, no-knead bread, scones, two-ingredient fudge, and peanut butter oat bites all work with no eggs at all. For egg-dependent recipes, ¼ cup applesauce or mashed banana per egg works in muffins and quick breads.
Meringues (egg whites and sugar), no-knead bread (flour and yeast, plus salt and water), and chocolate fudge (chocolate chips and sweetened condensed milk) are the three genuine two-ingredient bakes.