Recipe is from Apples, Bean Dip, & Carrot Cake: Kids! Teach Yourself to Cook by Anne and Freya Dinshah available from American Vegan Society.

American Vegan Society Guacamole

Yield: ½ cup  
1 Tablespoon lime or lemon juice 
1 ripe avocado, Haas variety 
¼ teaspoon chili powder 
¼ teaspoon cumin 
¼ teaspoon salt 
1. Juice the lime (p. 66). Put 1 tablespoon of lime juice into the medium-large bowl.  
2. Wash and pit the avocado (p. 67). 
3. Scoop the avocado from its peel using a spoon. Place avocado on a plate. Mash with fork. Put into bowl. 
4. Add chili powder. Add cumin. Add salt. Mix well in a mashing style. 
Serving: goes well with tortilla chips.