Prepare the Dough
Combine warm milk, yeast, and 1 teaspoon sugar.
Let stand for 5–10 minutes until foamy.
Add remaining sugar, eggs, melted butter, vanilla, and salt.
Gradually mix in flour until a soft dough forms.
Knead for 8–10 minutes until smooth and elastic.
First Rise
Place dough in a greased bowl.
Cover with plastic wrap or a towel.
Allow to rise in a warm place for 1–1½ hours, or until doubled in size.
Shape the Doughnuts
Roll dough to ½-inch thickness.
Cut into rounds using a 3-inch cutter.
Place on parchment-lined trays.
Cover and let rise for another 30–40 minutes.
Make the Crumble
Mix flour, brown sugar, salt, and butter.
Rub together until crumbly.
Bake at 350°F (175°C) for 8–10 minutes.
Cool completely.
Fry the Doughnuts
Heat oil to 350°F (175°C).
Fry doughnuts 1–2 minutes per side until golden.
Transfer to a wire rack to cool.
Prepare the Cream Filling
Beat heavy cream, powdered sugar, and vanilla until stiff peaks form.
Transfer to a piping bag fitted with a filling tip.
Make the Strawberry Glaze
Mix powdered sugar and strawberry puree.
Add milk until smooth.
Stir in pink coloring if desired.
Assemble
Fill each cooled doughnut with vanilla cream.
Dip the tops in strawberry glaze.
Spoon a little strawberry jam mixture over the glaze.
Sprinkle with diced strawberries.
Finish with the baked crumble topping.