The gem-studded puffball, also a choice edible, resembles this mushroom, but the former is covered with tiny spines and grows on the ground.
Poisonous earthballs (Scleroderma) begin white inside, but they soon turn black, and they're always hard, whereas this puffball is always soft.
Always cut open small puffballs to make sure there are no gills or stem inside, indicating possibly deadly amanitas. However, amanitas grow on the ground. This puffball always grow on dead wood.