If you don't have bronzer on hand, there are a few alternatives you can use to achieve a similar effect:

1. Matte Brown Eyeshadow: Look for a matte brown eyeshadow that is a few shades darker than your skin tone. Using a fluffy brush, lightly dust the eyeshadow on the areas where you would normally apply bronzer, such as the hollows of your cheeks, temples, and jawline. Blend well for a natural-looking contour.

2. Powdered Cocoa: If you have unsweetened cocoa powder in your pantry, it can be a great substitute for bronzer. Mix a small amount of cocoa powder with a translucent face powder to create a shade that matches your skin tone. Apply it with a brush in the same areas you would use bronzer.

3. Blush: If you have a matte blush in a warm, earthy tone, it can work as a substitute for bronzer. Apply it lightly to the areas where you would normally use bronzer, focusing on the outer edges of your face for a subtle contour.

Remember to start with a small amount of product and build up gradually to avoid applying too much color. Additionally, always blend well to achieve a natural-looking finish.