Mix together the ½ cup of flour and ¼ teaspoon of salt in a small bowl and pre-heat your oven to 425F. It has to be that hot, as the heat is what will make the pastry puff up.
In a sauce pan add the ½ cup of water, 4 tablespoons of unsalted butter and ½ teaspoons of sugar.
Place the pan on the stove and turn to medium heat. Don't forget to have that bowl of flour and salt next to the stove. You need to add it in quickly once it starts to boil.
Once you start to see the edges of the mixture boil, add in the flour and salt mixture to the pan, but turn the heat down to low. Use a wooden spoon to mix the dough well.
Once the dough starts to clump together like a ball and looks a bit dry, turn off the heat and take it off the stove. It will take about 2 minutes of stirring to get it to this stage.
Transfer the dough to a bowl and leave it to cool for 5 minutes. While the dough is cooling down whisk together the 2 eggs in a small bowl.
Once the dough is cool add in the eggs and quickly whisk it in. Stop when it's nice and smooth and change to a spatula and smooth down the sides of the bowl.
To get the ideal Ube Cream Puff shape you will need to pipe the dough into round mounds. You will need a 2 cm plain piping tip and a piping bag. Cut the end of the bag and place through the end of the bag. Fold the bag over to make it easier to add the dough in. Use the spatula to spoon the dough in the prepare piping bag and then slowly push the dough down so that it reaches the inside of the piping tip. Don't press too hard or it will seep out before it's ready.
I like using silicon macaron templates to make the puffs. It's the perfect one bite size to pop in the mouth. Place it on a baking sheet. Now pipe the dough into about 2 inch domes, leaving space in between so that it has room to grow.
Once you are done piping, dip your finger in water and pat down any spikes of dough.
Once the Choux Pastry is ready bake in the oven for 20 minutes. Then take it out of the oven and turn the temperature down to 350F and bake for a further 5 minutes just to dry it out.
Transfer to a wire rack to cool fully. While it's cooling down make the Ube Glaze.