Mix ingredients in a medium bowl: combine chia seeds, almond milk, maple syrup, and vanilla extract, whisk until smooth.

Prep raspberries by gently mashing them in a separate bowl until chunky or blend for a smoother texture.

Combine mixtures by folding the mashed raspberries into the thickened chia mixture until well incorporated.

Chill the mixture in the refrigerator for at least 2 hours or overnight covered with plastic wrap.

Serve after chilling, with optional toppings like sliced almonds or a drizzle of maple syrup.