1. Preheat the oven to 350°F.

2. In a mixer, whip the sugar and butter until the mixture is whitened. Add the eggs one by one, mixing after each addition. Add the flour gradually; mix briefly.

3. Butter and sugar a cake pan. Fill with the mixture and bake for 25 minutes.

4. Remove the cake from the oven and unmold onto a grid. Let cool completely.

5. Prepare the spread. In a high saucepan, pour the maple syrup with the corn syrup. Over low heat, reduce this mixture until thickened. Remove from heat. Incorporate the butter and salt. With a whisk, mix well until the caramel is homogeneous. Let cool completely.