In a large pot, add rice, 4 cups of milk, butter and vanilla extract. Cover and bring to a boil (don’t walk away so milk doesn’t run away). Reduce heat to low and cook covered for 40 minutes or until rice is soft and tender, stirring a few times and making sure rice is not burning.
Turn off heat and add remaining 2 cups of milk, raisins and chia seeds. Stir and let the pudding sit for 15 minutes.
Transfer to a large baking dish and add berries, Greek yogurt and maple syrup, then stir gently. Taste and adjust to taste, if you wish. Serve hot or warm.
Notes
Store: Refrigerate in an airtight container for up to 5 days.
Freeze: Freeze in an airtight container for up to 3 months. Thaw in the fridge overnight.