I'd go into some lengthy spiel about how tea brewing is an involved process that has been tried, tested and refined for centuries.

As it turns out, tea brewing is much simpler than that. In fact, all you have to do is learn the basic recipe and then play a game of mastermind. In fact, I can guarantee that once you read this you'll be brewing S-rank tea in less than 30 seconds.

First you will satisfy the princesses with teas that will fit their palate. Then you will stun them when they realize that that was the very first pot of tea that you've ever brewed in your entire life.

Now then! You ready?

Comforting Tea

Ingredients: Liquorice & Mint Leaf

To brew the perfect tea (S-Rank)
Dosage: Mid
Temperature: Min
Time: Max

Notes: Possible at Tea Brewer Level 0

Spring Sencha

Ingredients: Sencha & Rose

To brew the perfect tea (S-Rank)
Dosage: Min
Temperature: Max
Time: Mid

Notes: The Sencha ingredient is obtained after you level your Tea Brewing level (brew your first successful tea). This tea cannot be brewed before then.

It's time. The princesses are waiting.

Thanks to aubergine, the recipes for the higher level teas are now available. Here, I've translated and checked them.

Anyway, these teas cannot be made without prior experience because you need Tea Levels before their ingredients become available. It helps speed things up if you use "Finn's Teatime" found under the Main Screen's "Memories" when you unlock it.

As a sidenote, I didn't observe any differences in the storyline events when brewing and presenting a higher level tea.

Strawberry Sencha

Ingredients: Strawberry / Blueberry / Sencha

To brew the perfect tea (S-Rank)
Dosage: Min
Temperature: Max
Time: Mid

Cream Earl Spiced

Ingredients: Ceylon Black Tea / Bergamot / Butter

To brew the perfect tea (S-Rank)
Dosage: Mid
Temperature: Mid
Time: Mid

Violet Earl Spiced Tea

Ingredients: Ceylon Black Tea / Bergamot / Mallow

To brew the perfect tea (S-Rank)
Dosage: Mid
Temperature: Mid
Time: Mid

Classic Passion Fruit Spiced Tea

Ingredients: Ceylon Black Tea / Passion Fruit / Sunflower

To brew the perfect tea (S-Rank)
Dosage: Mid
Temperature: Mid
Time: Mid

Pepper Strawberry Rooibos

Ingredients: South African Rooibos, Strawberry, Red Pepper

To brew the perfect tea (S-Rank)
Dosage: Mid
Temperature: Mid
Time: Min

Fruit Mint Herb Tea

Ingredients: Liquorice / Lemongrass / Fruit / Mint Leaf

To brew the perfect tea (S-Rank)
Dosage: Mid
Temperature: Min
Time: Max

Blueberry Yogurt Rooibos

Ingredients: South African Rooibos / Yogurt / Blueberry / Cornflower

To brew the perfect tea (S-Rank)
Dosage: Mid
Temperature: Mid
Time: Min

Classic Caramel Spiced Tea

Ingredients: Ceylon Black Tea / Chocolate / Vanilla / Caramel

To brew the perfect tea (S-Rank)
Dosage: Mid
Temperature: Mid
Time: Mid

Queen Sencha

Ingredients: Sencha / Rose / Sunflower / Cornflower

To brew the perfect tea (S-Rank)
Dosage: Min
Temperature: Max
Time: Mid

Neroli Yerba Mate Herb Tea

Ingredients: Liquorice / Green Yerba Mate / Baked Yerba Mate / Flavedo / Neroli

To brew the perfect tea (S-Rank)
Dosage: Mid
Temperature: Min
Time: Max

Golden Mountain Fruit Tea

Ingredients: Roselle / Raisins / Pineapple / Watermelon / Cantaloupe

To brew the perfect tea (S-Rank)
Dosage: Max
Temperature: Mid
Time: Mid

Green Fruit Rooibos

Ingredients: Green Rooibos / Blueberry / Passion Fruit / Sunflower / Cornflower

To brew the perfect tea (S-Rank)
Dosage: Mid
Temperature: Mid
Time: Min

Banana Eden Fruit Tree

Ingredients: Liquorice / Fruits / Roselle / Rosehip / Banana / Aniseed

To brew the perfect tea (S-Rank)
Dosage: Max
Temperature: Mid
Time: Mid

Cherry Rum Fruit Tea

Ingredients: Raisins / Roselle / Beetroot / Rosebud / Black Currant / Elderberry / Cherry

To brew the perfect tea (S-Rank)
Dosage: Max
Temperature: Mid
Time: Mid