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Mix first 8 ingredients in a large bowl.
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Add remaining 10 ingredients (not including Crumble Topping), and mix until just combined.
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Mix crumble topping in a small bowl.
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Preheat oven to 375 degrees.
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Grease a standard-sized muffin tin well, or use paper liners.
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Fill 3/4 full, and sprinkle each muffin with 1 tsp of crumble topping.
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Bake approximately 22 minutes or until a toothpick inserted in the middle of the muffins comes out clean.
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Enjoy, and store in a cool dry container for up to three days.