The amount of spice to put in a curry can vary based on personal preferences and the type of curry you're making. Here are some points to consider when deciding how much spice to use:

Taste Preference: The level of spiciness in a curry is highly subjective. Some people enjoy milder flavours, while others prefer a fiery kick. Consider your own tolerance for heat and the preferences of those you're cooking for.

Type of Spice: Different spices have varying levels of heat. Common options include chilli powder, paprika, cayenne pepper, and curry powder. Research the Scoville heat scale to understand the heat levels of different spices and choose accordingly.

Start Conservatively: If you're unsure, it's best to start with a smaller amount of spice. You can always add more later if the curry isn't spicy enough, but it's harder to tone down excessive spice once it's been added.

Building Flavors: Spices not only provide heat but also contribute to the overall flavour profile of the curry. Start by adding a small amount and gradually build up to achieve the desired depth of flavour.

Balancing Ingredients: Consider the other ingredients in your curry. Creamy or dairy-based curries can help offset the spiciness, while leaner protein sources might enhance the heat. Balance is key to creating a well-rounded dish.

Trial and Adjustment: Cooking is an art that often involves experimentation. Taste the curry as it cooks and adjust the spice levels accordingly. Add a little at a time to avoid overpowering the dish.

Aromatics and Herbs: Apart from heat, spices contribute aroma and complexity. Use aromatic spices like cumin, coriander, and turmeric to enhance the overall flavour without necessarily increasing the heat.

Acidic Ingredients: Ingredients like tomatoes, citrus juices, or vinegar can mellow the heat of spices. If your curry is too spicy, you might be able to balance it by adding a touch of acidity.

Dilution: If your curry turns out too spicy, you can dilute the heat by adding more of the non-spicy components, like broth, coconut milk, or vegetables.

Cultural Authenticity: Different types of curries come from various culinary traditions, and each has its own spice profile. Research traditional recipes to get a sense of the typical spiciness level for the type of curry you're making.

Consider Dietary Restrictions: If cooking for a group, be mindful of any dietary restrictions or preferences. Some people may have medical conditions or personal preferences that require milder spice levels.

Enjoyment: Ultimately, the goal is to create a curry that you and your guests will enjoy. Whether it's mild or fiery, the level of spice should enhance the dining experience without overwhelming the palate.

Remember, cooking is a journey of exploration and taste. It's perfectly fine to adjust your approach over time as you gain more experience and better understand your own preferences and those of your diners.