Mix the oats, cinnamon, almond butter, honey and vanilla extract together in a bowl until it forms a sticky dough. (If the dough feels really dry, add more almond butter and honey.)
Line a muffin pan with muffin liners and add a spoonful of the granola dough into the bottom of each muffin cup. Press firmly with your fingers to make a sturdy base.
Add a spoonful of yogurt to each cup, then top with berries and any leftover granola.
Place in the freezer to set for at least 4 hours. Let thaw before serving.