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Preheat oven to 375° F.
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Prepare 15 muffin cups by lining with muffin papers or coating with spray.
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Combine flours, wheat germ, baking powder, baking soda, salt, and cinnamon in a medium bowl; mix well. Set aside.
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Combine eggs and maple syrup in a medium bowl; whisk to blend.
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Add buttermilk, oil, and extract; whisk to blend.
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Add flour mixture to egg mixture; mix until just blended.
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Gently fold in blueberries.
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Divide batter among 15 prepared muffin cups.
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Bake 13 to 14 minutes, or until golden brown and tester inserted into the center comes out clean.
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Transfer muffins to rack; cool.