Both are delicious, but using fresh spinach can add a more vibrant flavor. If you'd like to try this spinach dip recipe with fresh spinach, start by washing the leaves well. Once clean, blanch in boiling water for 30 seconds - just until they wilt. Drain and rinse with cold water to stop the spinach from cooking, and then squeeze out excess water using a kitchen towel. Give the leaves a fine chop and you're all set!