From Scraps to Seasoning: Make Your Own Gourmet Salts

We believe nothing should go to waste—especially when it can be delicious. Transforming kitchen scraps into gourmet seasonings is not just a sustainable practice, it’s also a fun, creative way to add depth and character to your cooking.

Think of those often-discarded ingredients: mushroom stems, tomato skins, or even leftover wine. Instead of tossing them, you can turn them into flavorful infused salts that bring a burst of personality to your dishes. Imagine umami-packed mushroom salt for roasted vegetables, bright tomato salt for pasta, earthy coffee salt for your next steak rub, or a sweet-savory wine salt perfect for pork roasts and grilled lamb.

These salts are easy to make and can be stored for months. Use non-iodized salt—like Maldon sea salt flakes or course kosher salt—as a base. The process involves drying, grinding, and mixing your chosen leftovers, optionally enhanced with herbs or zest. Whether using a dehydrator or a low-temp oven, the result is a pantry staple that’s as creative as it is practical.

Base Method for Infused Salts

Ingredients

• 1 cup non-iodized coarse salt (Maldon or kosher)
• ½ to 1 cup of prepared leftover ingredient (dehydrated and ground; see examples below)

Optional: herbs, spices, or citrus zest.

Instructions

Dehydrate your leftovers by spreading clean scraps on a dehydrator tray (135°F/57°C) for 4–8 hours or in an oven at 170°F (75°C) for 2–4 hours with the door slightly ajar. Stir occasionally. They’re ready when brittle and dry.

Process the dried scraps into a fine powder using a spice grinder, food processor, or mortar and pestle. Blend the powder with your salt until evenly combined. If the salt feels damp, return it to the dehydrator or oven for 30–60 minutes or air-dry overnight.

Store in an airtight container in a cool, dark place. Shelf life is roughly 3–6 months. Discard if you notice clumping or off-odors.

Infused Salt Recipes

Mushroom Stem Salt

A savory, umami-rich finishing salt made from mushroom stems—ideal for grilled meats, roasted vegetables, or popcorn.

Ingredients

• 1 cup coarse salt
• Stems from 1 lb (450g) mushrooms (button, cremini, or shiitake), cleaned and chopped
• 1 tsp dried thyme or rosemary (optional)

Instructions

Dehydrate the mushroom stems, grind to powder, and mix with salt and optional herbs. Dry further if needed. Store and use on steaks, eggs, or soups.

Tomato Skin Salt

A zesty, tangy salt that captures the essence of summer. Great for pasta, salads, or roasted fish.

Ingredients

• 1 cup coarse salt – roughly equal parts tomato and salt
• Skins from 2–3 lbs (900g–1.35kg) tomatoes
• 1 tsp dried basil or oregano (optional)

Instructions

Dehydrate tomato skins until brittle, then grind. Combine with salt and optional herbs. Use on caprese salad, avocado toast, or seafood.

Wine Reduction Salt

A sweet-savory rub made from leftover wine, perfect for autumn pork roasts, grilled lamb, or roasted nuts.

Ingredients

• 2 cups leftover white or red wine
• ¾ cup coarse salt
• 2 Tbsp fresh thyme leaves
• 2 strips lemon zest, finely chopped
• 1 cup sugar

Instructions

Reduce the wine to 2 Tbsp over low heat and cool. In a food processor, pulse salt, herbs, zest, and wine reduction. Add sugar and pulse to damp sand consistency. Dry in a warm oven or leave out overnight. Use on meats, nuts, or even as a cocktail rim salt.

Final Notes

Infused salts are endlessly adaptable. Try combining leftover citrus peels and herbs, or using beet skins, chili flakes, or even dried herbs from your garden. They make thoughtful gifts and are a satisfying way to reduce waste while enhancing your kitchen craft.