Prepare the Bananas: Peel and slice the bananas into small pieces.
Combine Ingredients: In a small saucepan, mix the granulated sugar, water, and salt.
Heat and Dissolve: Place the saucepan over medium heat. Stir continuously until the sugar completely dissolves.
Simmer: Add the sliced bananas and reduce the heat to low. Let the mixture gently simmer for 10-15 minutes, stirring occasionally to prevent sticking and aid banana breakdown.
Add Vanilla Extract: Remove the saucepan from heat. Stir in the vanilla extract. Allow the mixture to cool slightly.
Strain: After cooling a bit, strain the mixture through a fine mesh sieve or cheesecloth into a clean container to remove any banana solids.
Cool and Store: Let the syrup cool to room temperature before transferring it to a jar or bottle for storage. Refrigerate the banana syrup for up to two weeks.