Tomato Sauce
8.0best for marinadeSmoother and more concentrated; use half the amount and thin with water if needed
Marinades use tomato for acid-driven protein denaturation: at pH 4.3-4.5, surface proteins unfold within 30 minutes, but penetration past 1/4 inch takes 4-12 hours and over-marinating mushes muscle fibers. Salt-acid balance and acid pKa matter more than viscosity here. Substitutes are ranked by titratable acidity (target 0.4-0.6%), free-water for diffusion, and absence of starches that would form gummy crusts when grilled. Sugar contribution affects char timing too.
Smoother and more concentrated; use half the amount and thin with water if needed
Tomato sauce 0.5:1 cup loads acid faster into a marinade — 14-18% solids carry concentrated organic acids. Penetration past 1/4 inch still takes 4 hours; surface denatures within 25 minutes. Thin with 1 tbsp water plus 1 tbsp oil per 1/2 cup for diffusion. Salt-acid balance is pre-set.
Add lime juice for tanginess
Tomatillos 1:1 cup pureed make a sharper marinade than tomato — pH 3.8 versus 4.4 means surface protein denaturation is visible in 15-20 minutes. Cap marinating at 6 hours; longer and the acid mushes muscle fibers. Add 1 tsp lime juice per cup to anchor brightness through grilling.
Use 1/2 cup juice per cup diced tomatoes in sauces and soups; reduce other liquid
Tomato juice 0.5:1 cup is mostly water (95%) with pH 4.3 acid — better penetration speed than fresh tomato because of low viscosity. Reduce other liquid acid by an equal amount. Surface denatures in 30 minutes; deeper diffusion to 1/4 inch hits at 3 hours. Pat dry hard before grilling.
Different flavor but works in cooked dishes
Bell pepper pureed 1:1 cup gives a sweet-vegetal marinade base with no real acid. Add 2 tbsp lemon juice or vinegar per cup to hit pH 4 for protein denaturation. Sugar around 5% Brix means watch grill temperature — high heat past 425°F chars the surface within 90 seconds.
Underripe mango for tart fresh salsa swap
Underripe mango pureed at 1:1 cup makes a strong marinade — pH 3.4 plus natural papain-like enzymes denature surface proteins in under 20 minutes. Cap at 4 hours; longer mushes shrimp or fish. Sugar (around 6%) chars fast — grill at medium 375°F or finish in oven for full cook-through.
Roasted and diced, earthy with similar color
Pureed roasted beets 1:1 cup add color and earthiness but carry weak acid (pH 5.5). Add 2 tbsp red wine vinegar per cup to push pH below 4.5 for protein work. Sugar from caramelized roasting (around 7% Brix) chars fast on grill above 400°F; medium heat 375°F holds the marinade together.
Pureed for sauce, adds body and sweetness
Pumpkin puree 1:1 cup needs an acid boost to function as a marinade: add 2 tbsp lemon juice per cup or surface protein won't denature. Starches form a gummy crust on grills above 400°F — wipe excess marinade and grill at medium 375°F. Penetration past 1/8 inch is poor; surface treatment only.
Green unripe mango for acidity in salsas