1Mix flour, walnuts, sugar, baking powder, nutmeg, cinnamon, baking soda, and salt in a large bowl; make a well in the center.
2Whisk almond milk, bananas, melted butter, and vanilla extract together in a separate bowl until smooth. Whisk in egg. Pour mixture into the well in the flour mixture; stir until just combined.
3Heat a lightly oiled skillet over medium-high heat. Drop 1/4 cup batter into the skillet; tilt gently to spread batter evenly. Cook until bubbles form and the edges are firm, 3 to 4 minutes. Flip and cook until browned on the other side, 1 to 2 minutes more. Repeat with remaining batter.