Ciambellone Limone e Zafferano (Lemon and Saffron Bundt Cake)

Ingredients:
300g all-purpose flour
200g granulated sugar
1/2 tsp saffron threads
1 lemon (zest and juice)
4 large eggs
100g unsalted butter (melted)
120ml whole milk
1 tsp vanilla extract
1 1/2 tsp baking powder
A pinch of salt
Powdered sugar for dusting (optional)
Directions: