To start, use a generous amount of frosting to secure the base of your cabin to a cake stand or plate. I find that a cardboard cake board provides a stable platform on which to build the cabin because it is not as slippery as a typical plate.
Stack pretzel rods in alternating layers, using frosting to secure the corners in place.
Once your walls are built, smear a LOT of frosting on the back side of each wall. The frosting will push through and fill in the cracks, just like caulking on a real log cabin.
To form the supports for your roof, place one pretzel rod in each corner of the cabin, making a triangle shape with the point at the top.
Place graham crackers on top of your support beams, slightly overlapping, like large roof shingles. Use frosting like "glue" to hold the roof in place.
Place one pretzel rod in the middle of the top of the roof and press until frosting sets.
Use kitchen shears to trim the ends of the pretzel rod so they don't stick out too far. You can also use kitchen shears to trim pretzel rods to just the right size to make your log cabin door.
Cover the graham cracker roof with a light coat of frosting and decorate your log cabin with any fun candy you like.
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Notes
Note: Nutrition information is a rough estimate only; actual values will vary based on the exact ingredients used and amount of recipe prepared.