Building lean muscle requires a specific nutritional environment: sufficient protein to support muscle protein synthesis, enough carbohydrates to fuel training and support recovery, adequate fat for hormonal function, and a small caloric surplus (200-300 calories above maintenance). This grocery list optimises for all four requirements at reasonable cost.
Proteins: chicken breast and thighs (versatile, affordable), lean ground beef and beef mince (iron-rich, satisfying), eggs and liquid egg whites (fast, affordable protein), canned tuna and salmon (convenient), Greek yoghurt and cottage cheese (dairy protein), protein powder (efficient protein supplementation). Carbohydrates: oats (complex, slow-digesting breakfast carb), white and brown rice (easily digestible, neutral flavour), sweet potato (micronutrient-dense carb), fruit (bananas pre-workout, berries for antioxidants), pasta and bread (convenient calorie-dense carbs for high volume training periods).
Fats: olive oil (primary cooking fat), avocado (nutrient-dense), eggs (dual protein and fat source), nuts (cashews, almonds, walnuts as portable snacks). Vegetables: broccoli, spinach, kale, capsicum, zucchini, and whatever is seasonal and affordable. Frozen vegetables are nutritionally equivalent to fresh and more economical. This list from Aldi or Coles costs $120-150 per week for a person consuming 3,000 calories daily. Scale quantities proportionally for your calorie needs.