Heat a large skillet over medium-high heat and add the ground beef; cook, breaking it up, until just browned, about 5–6 minutes.
If using very fatty beef, spoon out excess fat, leaving a little for flavor; do not drain lean beef.
Add the minced garlic and grated ginger to the skillet and cook, stirring, for about 30 seconds until fragrant.
Add the chopped cabbage and chopped onion; sauté, stirring occasionally, for 8–10 minutes or until the cabbage is softened and the onions are cooked to your liking.
Remove the skillet from the heat and stir in the hoisin sauce, creamy peanut butter, soy sauce, and ríracha; taste and adjust seasonings as desired.
Serve immediately, optionally over rice or with chopped scallions for color.
